Update CHANGELOG-1.16.md for v1.16.0-alpha.2.
Update CHANGELOG-1.16.md for v1.16.0-alpha.2.

dlorenc/kubernetes,shyamjvs/kubernetes,k82cn/kubernetes,JacobTanenbaum/kubernetes,mfojtik/kubernetes,humblec/kubernetes,mboersma/kubernetes,erwinvaneyk/kubernetes,mkumatag/kubernetes,jagosan/kubernetes,bizhao/kubernetes,x13n/kubernetes,luxas/kubernetes,thockin/kubernetes,cmluciano/kubernetes,mYmNeo/kubernetes,coolsvap/kubernetes,jessfraz/kubernetes,bizhao/kubernetes,lojies/kubernetes,DiamantiCom/kubernetes,li-ang/kubernetes,wanghaoran1988/kubernetes,klaus1982/kubernetes,njuicsgz/kubernetes-1,matthyx/kubernetes,soltysh/kubernetes,kitt1987/kubernetes,sethpollack/kubernetes,LalatenduMohanty/kubernetes,derekwaynecarr/kubernetes,chrislovecnm/kubernetes,dims/kubernetes,johscheuer/kubernetes,stevesloka/kubernetes,krmayankk/kubernetes,tallclair/kubernetes,dereknex/kubernetes,huangjiuyuan/kubernetes,enj/kubernetes,intelsdi-x/kubernetes,wenlxie/kubernetes,jsafrane/kubernetes,Hui-Zhi/kubernetes,joelsmith/kubernetes,cadmuxe/kubernetes,bparees/kubernetes,DiamantiCom/kubernetes,jessfraz/kubernetes,LalatenduMohanty/kubernetes,enj/kubernetes,rafax/kubernetes,cantbewong/kubernetes,cblecker/kubernetes,tomerf/kubernetes,tengqm/kubernetes,sdminonne/kubernetes,jfrazelle/kubernetes,rrati/kubernetes,frodenas/kubernetes,kubernetes/kubernetes,fabriziopandini/kubernetes,aveshagarwal/kubernetes,PI-Victor/kubernetes,weiwei04/kubernetes,ixdy/kubernetes,JacobTanenbaum/kubernetes,jdef/kubernetes,pwittrock/kubernetes,dlorenc/kubernetes,frodenas/kubernetes,mikebrow/kubernetes,jdef/kubernetes,wanghaoran1988/kubernetes,derekwaynecarr/kubernetes,khenidak/kubernetes,kubernetes/kubernetes,cmluciano/kubernetes,liggitt/kubernetes,fgimenez/kubernetes,DiamantiCom/kubernetes,mahak/kubernetes,dereknex/kubernetes,erwinvaneyk/kubernetes,cofyc/kubernetes,sethpollack/kubernetes,verult/kubernetes,ConnorDoyle/kubernetes,pmorie/kubernetes,hex108/kubernetes,joelsmith/kubernetes,xychu/kubernetes,mengqiy/kubernetes,cblecker/kubernetes,jsafrane/kubernetes,pmorie/kubernetes,mosoft521/kubernetes,dlorenc/kubernetes,sdminonne/kubernetes,mml/kubernetes,bparees/kubernetes,mosoft521/kubernetes,spzala/kubernetes,zhangmingld/kubernetes,chestack/kubernetes,verb/kubernetes,cofyc/kubernetes,MHBauer/kubernetes,pweil-/kubernetes,GulajavaMinistudio/kubernetes,aledbf/kubernetes,feiskyer/kubernetes,cofyc/kubernetes,bizhao/kubernetes,joelsmith/kubernetes,joelsmith/kubernetes,du2016/kubernetes,chrislovecnm/kubernetes,olivierlemasle/kubernetes,sanjeevm0/kubernetes,ConnorDoyle/kubernetes,andrewsykim/kubernetes,nckturner/kubernetes,warmchang/kubernetes,intelsdi-x/kubernetes,warmchang/kubernetes,Lion-Wei/kubernetes,cadmuxe/kubernetes,brendandburns/kubernetes,MHBauer/kubernetes,aveshagarwal/kubernetes,carlory/kubernetes,roberthbailey/kubernetes,jingxu97/kubernetes,johscheuer/kubernetes,li-ang/kubernetes,hex108/kubernetes,cadmuxe/kubernetes,micahhausler/kubernetes,khenidak/kubernetes,mikedanese/kubernetes,chrislovecnm/kubernetes,Acidburn0zzz/kubernetes,deads2k/kubernetes,PI-Victor/kubernetes,ConnorDoyle/kubernetes,Clarifai/kubernetes,pires/kubernetes,luxas/kubernetes,zhouhaibing089/kubernetes,lojies/kubernetes,nak3/kubernetes,luxas/kubernetes,rafax/kubernetes,huangjiuyuan/kubernetes,Acidburn0zzz/kubernetes,tpepper/kubernetes,pweil-/kubernetes,saad-ali/kubernetes,MikeSpreitzer/kubernetes,ravilr/kubernetes,MikeSpreitzer/kubernetes,fabriziopandini/kubernetes,zetaab/kubernetes,kevensen/kubernetes,deads2k/kubernetes,mfojtik/kubernetes,dixudx/kubernetes,nak3/kubernetes,k82cn/kubernetes,mboersma/kubernetes,jingxu97/kubernetes,pweil-/kubernetes,coolsvap/kubernetes,davidz627/kubernetes,mikebrow/kubernetes,gnufied/kubernetes,humblec/kubernetes,matthyx/kubernetes,frodenas/kubernetes,cmluciano/kubernetes,fgimenez/kubernetes,wenlxie/kubernetes,ravisantoshgudimetla/kubernetes,jfrazelle/kubernetes,erwinvaneyk/kubernetes,lojies/kubernetes,JacobTanenbaum/kubernetes,kitt1987/kubernetes,verb/kubernetes,ping035627/kubernetes,iameli/kubernetes,ping035627/kubernetes,derekwaynecarr/kubernetes,jackfrancis/kubernetes,cantbewong/kubernetes,jingxu97/kubernetes,Hui-Zhi/kubernetes,yarntime/kubernetes,njuicsgz/kubernetes-1,saad-ali/kubernetes,cadmuxe/kubernetes,brendandburns/kubernetes,wongma7/kubernetes,mboersma/kubernetes,verult/kubernetes,xlgao-zju/kubernetes,andrewrynhard/kubernetes,weiwei04/kubernetes,sanjeevm0/kubernetes,li-ang/kubernetes,rnaveiras/kubernetes,rrati/kubernetes,kubernetes/kubernetes,derekwaynecarr/kubernetes,ravisantoshgudimetla/kubernetes,ravilr/kubernetes,dixudx/kubernetes,dereknex/kubernetes,dixudx/kubernetes,DiamantiCom/kubernetes,hex108/kubernetes,mahak/kubernetes,ravisantoshgudimetla/kubernetes,liggitt/kubernetes,lichuqiang/kubernetes,chrislovecnm/kubernetes,zetaab/kubernetes,huangjiuyuan/kubernetes,cofyc/kubernetes,liggitt/kubernetes,ixdy/kubernetes,lojies/kubernetes,liggitt/kubernetes,mboersma/kubernetes,matthyx/kubernetes,fgimenez/kubernetes,jessfraz/kubernetes,pweil-/kubernetes,jennybuckley/kubernetes,aledbf/kubernetes,dims/kubernetes,micahhausler/kubernetes,pwittrock/kubernetes,andrewsykim/kubernetes,verb/kubernetes,coolsvap/kubernetes,kevin-wangzefeng/kubernetes,Hui-Zhi/kubernetes,Clarifai/kubernetes,spzala/kubernetes,mkumatag/kubernetes,thockin/kubernetes,du2016/kubernetes,sdminonne/kubernetes,fanzhangio/kubernetes,fgimenez/kubernetes,tomzhang/kubernetes,nak3/kubernetes,carlory/kubernetes,deads2k/kubernetes,kow3ns/kubernetes,tomzhang/kubernetes,ixdy/kubernetes,monopole/kubernetes,davidz627/kubernetes,du2016/kubernetes,monopole/kubernetes,wongma7/kubernetes,johscheuer/kubernetes,cofyc/kubernetes,jdef/kubernetes,chrislovecnm/kubernetes,cantbewong/kubernetes,jennybuckley/kubernetes,verb/kubernetes,mboersma/kubernetes,njuicsgz/kubernetes-1,u2takey/kubernetes,shyamjvs/kubernetes,csrwng/kubernetes,wanghaoran1988/kubernetes,pires/kubernetes,andrewrynhard/kubernetes,alejandroEsc/kubernetes,sanjeevm0/kubernetes,wongma7/kubernetes,PiotrProkop/kubernetes,tomzhang/kubernetes,xlgao-zju/kubernetes,spzala/kubernetes,ingvagabund/kubernetes,Lion-Wei/kubernetes,carlory/kubernetes,tengqm/kubernetes,olivierlemasle/kubernetes,linux-on-ibm-z/kubernetes,feiskyer/kubernetes,monopole/kubernetes,kevensen/kubernetes,iterion/kubernetes,jdef/kubernetes,feiskyer/kubernetes,iterion/kubernetes,PiotrProkop/kubernetes,lichuqiang/kubernetes,derekwaynecarr/kubernetes,davidz627/kubernetes,PI-Victor/kubernetes,jackfrancis/kubernetes,nikhita/kubernetes,xlgao-zju/kubernetes,sdminonne/kubernetes,tcnghia/kubernetes,krmayankk/kubernetes,enj/kubernetes,luxas/kubernetes,thockin/kubernetes,nckturner/kubernetes,Acidburn0zzz/kubernetes,chestack/kubernetes,krmayankk/kubernetes,xlgao-zju/kubernetes,stevesloka/kubernetes,bizhao/kubernetes,verb/kubernetes,dims/kubernetes,nckturner/kubernetes,khenidak/kubernetes,tomerf/kubernetes,sanjeevm0/kubernetes,coolsvap/kubernetes,u2takey/kubernetes,cmluciano/kubernetes,tallclair/kubernetes,iameli/kubernetes,pires/kubernetes,alejandroEsc/kubernetes,maciaszczykm/kubernetes,stevesloka/kubernetes,PI-Victor/kubernetes,Lion-Wei/kubernetes,zhangmingld/kubernetes,x13n/kubernetes,idvoretskyi/kubernetes,kitt1987/kubernetes,tengqm/kubernetes,mahak/kubernetes,kevin-wangzefeng/kubernetes,csrwng/kubernetes,pmorie/kubernetes,rafax/kubernetes,jdef/kubernetes,feiskyer/kubernetes,derekwaynecarr/kubernetes,nikhita/kubernetes,mikedanese/kubernetes,shyamjvs/kubernetes,idvoretskyi/kubernetes,mikedanese/kubernetes,zetaab/kubernetes,bizhao/kubernetes,lojies/kubernetes,kevin-wangzefeng/kubernetes,Clarifai/kubernetes,jingxu97/kubernetes,dereknex/kubernetes,rafax/kubernetes,ConnorDoyle/kubernetes,alejandroEsc/kubernetes,lichuqiang/kubernetes,kubernetes/kubernetes,khenidak/kubernetes,pwittrock/kubernetes,fabriziopandini/kubernetes,frodenas/kubernetes,GulajavaMinistudio/kubernetes,olivierlemasle/kubernetes,gnufied/kubernetes,joelsmith/kubernetes,fanzhangio/kubernetes,yarntime/kubernetes,BenTheElder/kubernetes,x13n/kubernetes,sanjeevm0/kubernetes,zhangmingld/kubernetes,verult/kubernetes,yujuhong/kubernetes,mkumatag/kubernetes,Hui-Zhi/kubernetes,saad-ali/kubernetes,khenidak/kubernetes,PI-Victor/kubernetes,pwittrock/kubernetes,DiamantiCom/kubernetes,x13n/kubernetes,csrwng/kubernetes,fejta/kubernetes,wanghaoran1988/kubernetes,nikhita/kubernetes,erwinvaneyk/kubernetes,iameli/kubernetes,jsafrane/kubernetes,mikedanese/kubernetes,maciaszczykm/kubernetes,Lion-Wei/kubernetes,dereknex/kubernetes,hex108/kubernetes,ingvagabund/kubernetes,yarntime/kubernetes,Clarifai/kubernetes,Clarifai/kubernetes,rnaveiras/kubernetes,warmchang/kubernetes,humblec/kubernetes,jsafrane/kubernetes,cadmuxe/kubernetes,tcnghia/kubernetes,Acidburn0zzz/kubernetes,erwinvaneyk/kubernetes,khenidak/kubernetes,nak3/kubernetes,kow3ns/kubernetes,hex108/kubernetes,shyamjvs/kubernetes,kpgriffith/kubernetes,ravilr/kubernetes,tcnghia/kubernetes,sdminonne/kubernetes,mkumatag/kubernetes,gnufied/kubernetes,nikhita/kubernetes,enj/kubernetes,andrewrynhard/kubernetes,fabriziopandini/kubernetes,zhangmingld/kubernetes,johscheuer/kubernetes,sethpollack/kubernetes,zhouhaibing089/kubernetes,njuicsgz/kubernetes-1,LalatenduMohanty/kubernetes,huangjiuyuan/kubernetes,andrewsykim/kubernetes,dims/kubernetes,pires/kubernetes,carlory/kubernetes,krmayankk/kubernetes,brendandburns/kubernetes,kevin-wangzefeng/kubernetes,ii/kubernetes,dixudx/kubernetes,mboersma/kubernetes,liggitt/kubernetes,rnaveiras/kubernetes,kitt1987/kubernetes,k82cn/kubernetes,davidz627/kubernetes,aledbf/kubernetes,jennybuckley/kubernetes,cmluciano/kubernetes,spzala/kubernetes,xychu/kubernetes,ii/kubernetes,jingxu97/kubernetes,wenlxie/kubernetes,soltysh/kubernetes,soltysh/kubernetes,stevesloka/kubernetes,davidz627/kubernetes,wenlxie/kubernetes,maciaszczykm/kubernetes,rnaveiras/kubernetes,BenTheElder/kubernetes,PiotrProkop/kubernetes,carlory/kubernetes,nckturner/kubernetes,u2takey/kubernetes,ravilr/kubernetes,mosoft521/kubernetes,aledbf/kubernetes,nak3/kubernetes,Lion-Wei/kubernetes,bparees/kubernetes,lichuqiang/kubernetes,k82/kubernetes,yarntime/kubernetes,coolsvap/kubernetes,tallclair/kubernetes,kevensen/kubernetes,tcnghia/kubernetes,zetaab/kubernetes,fabriziopandini/kubernetes,fgimenez/kubernetes,matthyx/kubernetes,brendandburns/kubernetes,tomerf/kubernetes,u2takey/kubernetes,csrwng/kubernetes,Lion-Wei/kubernetes,tomzhang/kubernetes,tpepper/kubernetes,intelsdi-x/kubernetes,zhouhaibing089/kubernetes,maciaszczykm/kubernetes,stevesloka/kubernetes,tcnghia/kubernetes,MikeSpreitzer/kubernetes,tallclair/kubernetes,nak3/kubernetes,jfrazelle/kubernetes,zetaab/kubernetes,dlorenc/kubernetes,PiotrProkop/kubernetes,yujuhong/kubernetes,luxas/kubernetes,ping035627/kubernetes,jsafrane/kubernetes,dixudx/kubernetes,x13n/kubernetes,joelsmith/kubernetes,soltysh/kubernetes,ingvagabund/kubernetes,tomzhang/kubernetes,gnufied/kubernetes,mengqiy/kubernetes,u2takey/kubernetes,zhouhaibing089/kubernetes,monopole/kubernetes,rrati/kubernetes,krmayankk/kubernetes,weiwei04/kubernetes,jagosan/kubernetes,Clarifai/kubernetes,Hui-Zhi/kubernetes,mikebrow/kubernetes,huangjiuyuan/kubernetes,mengqiy/kubernetes,pmorie/kubernetes,mml/kubernetes,tomzhang/kubernetes,Acidburn0zzz/kubernetes,mml/kubernetes,k82/kubernetes,jackfrancis/kubernetes,zetaab/kubernetes,verult/kubernetes,matthyx/kubernetes,xlgao-zju/kubernetes,wenlxie/kubernetes,iameli/kubernetes,zhouhaibing089/kubernetes,frodenas/kubernetes,luxas/kubernetes,kpgriffith/kubernetes,lichuqiang/kubernetes,gnufied/kubernetes,andrewsykim/kubernetes,LalatenduMohanty/kubernetes,bparees/kubernetes,ii/kubernetes,DiamantiCom/kubernetes,brendandburns/kubernetes,jagosan/kubernetes,k82/kubernetes,mosoft521/kubernetes,aveshagarwal/kubernetes,fejta/kubernetes,rrati/kubernetes,fejta/kubernetes,yujuhong/kubernetes,wanghaoran1988/kubernetes,mYmNeo/kubernetes,mengqiy/kubernetes,ixdy/kubernetes,chestack/kubernetes,zhangmingld/kubernetes,ingvagabund/kubernetes,jfrazelle/kubernetes,olivierlemasle/kubernetes,ravisantoshgudimetla/kubernetes,aveshagarwal/kubernetes,xychu/kubernetes,tomzhang/kubernetes,cmluciano/kubernetes,spzala/kubernetes,tomzhang/kubernetes,maciaszczykm/kubernetes,warmchang/kubernetes,mikedanese/kubernetes,sethpollack/kubernetes,iterion/kubernetes,ixdy/kubernetes,xychu/kubernetes,tomerf/kubernetes,thockin/kubernetes,lichuqiang/kubernetes,kpgriffith/kubernetes,tengqm/kubernetes,andrewsykim/kubernetes,cofyc/kubernetes,dlorenc/kubernetes,ii/kubernetes,ConnorDoyle/kubernetes,tpepper/kubernetes,yarntime/kubernetes,jackfrancis/kubernetes,mboersma/kubernetes,bizhao/kubernetes,warmchang/kubernetes,klaus1982/kubernetes,andrewrynhard/kubernetes,linux-on-ibm-z/kubernetes,MHBauer/kubernetes,mikebrow/kubernetes,intelsdi-x/kubernetes,verult/kubernetes,jessfraz/kubernetes,chestack/kubernetes,k82/kubernetes,kow3ns/kubernetes,alejandroEsc/kubernetes,chestack/kubernetes,fanzhangio/kubernetes,frodenas/kubernetes,roberthbailey/kubernetes,pweil-/kubernetes,kubernetes/kubernetes,JacobTanenbaum/kubernetes,k82/kubernetes,ingvagabund/kubernetes,kevensen/kubernetes,JacobTanenbaum/kubernetes,maciaszczykm/kubernetes,BenTheElder/kubernetes,alejandroEsc/kubernetes,tallclair/kubernetes,soltysh/kubernetes,jennybuckley/kubernetes,MHBauer/kubernetes,k82cn/kubernetes,krmayankk/kubernetes,linux-on-ibm-z/kubernetes,mml/kubernetes,kpgriffith/kubernetes,ravisantoshgudimetla/kubernetes,stevesloka/kubernetes,fejta/kubernetes,davidz627/kubernetes,kow3ns/kubernetes,nckturner/kubernetes,GulajavaMinistudio/kubernetes,roberthbailey/kubernetes,tallclair/kubernetes,tcnghia/kubernetes,wongma7/kubernetes,mfojtik/kubernetes,mml/kubernetes,Acidburn0zzz/kubernetes,micahhausler/kubernetes,aledbf/kubernetes,jennybuckley/kubernetes,u2takey/kubernetes,jessfraz/kubernetes,klaus1982/kubernetes,cadmuxe/kubernetes,kitt1987/kubernetes,BenTheElder/kubernetes,openshift/kubernetes,cblecker/kubernetes,mfojtik/kubernetes,jagosan/kubernetes,x13n/kubernetes,shyamjvs/kubernetes,BenTheElder/kubernetes,thockin/kubernetes,ping035627/kubernetes,du2016/kubernetes,andrewsykim/kubernetes,wongma7/kubernetes,saad-ali/kubernetes,dlorenc/kubernetes,fejta/kubernetes,cantbewong/kubernetes,zhangmingld/kubernetes,nikhita/kubernetes,du2016/kubernetes,roberthbailey/kubernetes,njuicsgz/kubernetes-1,mahak/kubernetes,openshift/kubernetes,saad-ali/kubernetes,cantbewong/kubernetes,mosoft521/kubernetes,tpepper/kubernetes,PI-Victor/kubernetes,k82cn/kubernetes,hex108/kubernetes,roberthbailey/kubernetes,saad-ali/kubernetes,verult/kubernetes,mboersma/kubernetes,tengqm/kubernetes,fejta/kubernetes,weiwei04/kubernetes,micahhausler/kubernetes,ixdy/kubernetes,sanjeevm0/kubernetes,pires/kubernetes,ConnorDoyle/kubernetes,mengqiy/kubernetes,mfojtik/kubernetes,njuicsgz/kubernetes-1,idvoretskyi/kubernetes,dereknex/kubernetes,tomzhang/kubernetes,pwittrock/kubernetes,erwinvaneyk/kubernetes,yarntime/kubernetes,yujuhong/kubernetes,jackfrancis/kubernetes,cantbewong/kubernetes,tpepper/kubernetes,klaus1982/kubernetes,enj/kubernetes,mml/kubernetes,kevin-wangzefeng/kubernetes,MHBauer/kubernetes,iterion/kubernetes,fanzhangio/kubernetes,weiwei04/kubernetes,jdef/kubernetes,tpepper/kubernetes,fgimenez/kubernetes,pires/kubernetes,li-ang/kubernetes,pwittrock/kubernetes,MikeSpreitzer/kubernetes,LalatenduMohanty/kubernetes,monopole/kubernetes,csrwng/kubernetes,ping035627/kubernetes,pweil-/kubernetes,xlgao-zju/kubernetes,iameli/kubernetes,mYmNeo/kubernetes,linux-on-ibm-z/kubernetes,njuicsgz/kubernetes-1,chrislovecnm/kubernetes,tomerf/kubernetes,intelsdi-x/kubernetes,mYmNeo/kubernetes,tomerf/kubernetes,openshift/kubernetes,mfojtik/kubernetes,rrati/kubernetes,aveshagarwal/kubernetes,intelsdi-x/kubernetes,cblecker/kubernetes,yujuhong/kubernetes,wanghaoran1988/kubernetes,fanzhangio/kubernetes,GulajavaMinistudio/kubernetes,aveshagarwal/kubernetes,micahhausler/kubernetes,idvoretskyi/kubernetes,kpgriffith/kubernetes,openshift/kubernetes,xychu/kubernetes,fanzhangio/kubernetes,kevensen/kubernetes,mikebrow/kubernetes,dims/kubernetes,LalatenduMohanty/kubernetes,olivierlemasle/kubernetes,jfrazelle/kubernetes,mahak/kubernetes,mYmNeo/kubernetes,jennybuckley/kubernetes,weiwei04/kubernetes,ii/kubernetes,pmorie/kubernetes,mYmNeo/kubernetes,ravisantoshgudimetla/kubernetes,johscheuer/kubernetes,openshift/kubernetes,bparees/kubernetes,mkumatag/kubernetes,huangjiuyuan/kubernetes,andrewrynhard/kubernetes,ingvagabund/kubernetes,coolsvap/kubernetes,rnaveiras/kubernetes,iterion/kubernetes,pmorie/kubernetes,wenlxie/kubernetes,ravilr/kubernetes,Hui-Zhi/kubernetes,kow3ns/kubernetes,yujuhong/kubernetes,jagosan/kubernetes,humblec/kubernetes,JacobTanenbaum/kubernetes,idvoretskyi/kubernetes,kow3ns/kubernetes,njuicsgz/kubernetes-1,johscheuer/kubernetes,deads2k/kubernetes,sethpollack/kubernetes,kpgriffith/kubernetes,MHBauer/kubernetes,idvoretskyi/kubernetes,xychu/kubernetes,linux-on-ibm-z/kubernetes,cblecker/kubernetes,GulajavaMinistudio/kubernetes,feiskyer/kubernetes,humblec/kubernetes,li-ang/kubernetes,andrewrynhard/kubernetes,deads2k/kubernetes,iterion/kubernetes,kitt1987/kubernetes,PiotrProkop/kubernetes,brendandburns/kubernetes,MikeSpreitzer/kubernetes