Update NodeSSHHosts to support clusters with some public nodes
Update NodeSSHHosts to support clusters with some public nodes

This is to support the setup where we have private nodes and one additional
heapster node with public IP. We plan to use this setup in our scale
tests.

Ref. https://github.com/kubernetes/kubernetes/issues/76374

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