Add kubectlPath flag to e2e_node.test
Add kubectlPath flag to e2e_node.test

e2e_node.test does not set default kubectlPath, which lead to test
errors as following:
[Fail] [sig-storage] EmptyDir volumes [It] pod should support
shared volumes between containers [Conformance]

When the test trying to read file in shared volume, it uses
"kubeclt exec namespace -c container_name -- cat file_name".
However, as variable framework.TestContext.KubectlPath not set,
kubectl binary can not be found in the test and the tast fails.

This patch move kubectlPath flag from RegisterClusterFlags to
RegisterCommonFlags, thus default value for
framework.TestContext.KubectlPath will be set,and
user can also use --kubectl-path flag to set kubectl path.

Signed-off-by: Howard Zhang <90ec7750b2604c925990bbc10f98dfe9138a4c1a@arm.com>

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