Switch to debian:stable-slim for conformance image base
Switch to debian:stable-slim for conformance image base

The currently used debian:stretch-slim does not support s390x arch in
its multi-arch build. We opt to use stable-slim instead of pulling in
different base images for each platform build.

Signed-off-by: hasheddan <fff88e83cd964a817f9e74a48f8df9cd0b6b9759@gmail.com>

cmluciano/kubernetes,kpgriffith/kubernetes,ravilr/kubernetes,nak3/kubernetes,xychu/kubernetes,pires/kubernetes,fabriziopandini/kubernetes,mikedanese/kubernetes,yujuhong/kubernetes,mYmNeo/kubernetes,zhouhaibing089/kubernetes,micahhausler/kubernetes,alejandroEsc/kubernetes,kitt1987/kubernetes,dims/kubernetes,BenTheElder/kubernetes,aledbf/kubernetes,iameli/kubernetes,brendandburns/kubernetes,idvoretskyi/kubernetes,PiotrProkop/kubernetes,matthyx/kubernetes,jdef/kubernetes,xlgao-zju/kubernetes,verult/kubernetes,dereknex/kubernetes,nikhita/kubernetes,xychu/kubernetes,nckturner/kubernetes,sanjeevm0/kubernetes,chestack/kubernetes,fabriziopandini/kubernetes,mfojtik/kubernetes,stevesloka/kubernetes,deads2k/kubernetes,x13n/kubernetes,kevin-wangzefeng/kubernetes,rafax/kubernetes,openshift/kubernetes,ingvagabund/kubernetes,jdef/kubernetes,gnufied/kubernetes,fanzhangio/kubernetes,xlgao-zju/kubernetes,jingxu97/kubernetes,carlory/kubernetes,cmluciano/kubernetes,nikhita/kubernetes,sdminonne/kubernetes,shyamjvs/kubernetes,mikedanese/kubernetes,sdminonne/kubernetes,mosoft521/kubernetes,rnaveiras/kubernetes,verb/kubernetes,gnufied/kubernetes,weiwei04/kubernetes,chestack/kubernetes,jsafrane/kubernetes,kubernetes/kubernetes,ravilr/kubernetes,jackfrancis/kubernetes,thockin/kubernetes,coolsvap/kubernetes,dereknex/kubernetes,olivierlemasle/kubernetes,cblecker/kubernetes,mengqiy/kubernetes,jackfrancis/kubernetes,joelsmith/kubernetes,kpgriffith/kubernetes,monopole/kubernetes,xlgao-zju/kubernetes,matthyx/kubernetes,aledbf/kubernetes,tengqm/kubernetes,ingvagabund/kubernetes,verb/kubernetes,MikeSpreitzer/kubernetes,linux-on-ibm-z/kubernetes,xychu/kubernetes,thockin/kubernetes,lojies/kubernetes,zhangmingld/kubernetes,dims/kubernetes,enj/kubernetes,kitt1987/kubernetes,bparees/kubernetes,mYmNeo/kubernetes,cmluciano/kubernetes,kevin-wangzefeng/kubernetes,soltysh/kubernetes,joelsmith/kubernetes,ping035627/kubernetes,mahak/kubernetes,GulajavaMinistudio/kubernetes,mahak/kubernetes,gnufied/kubernetes,x13n/kubernetes,rrati/kubernetes,soltysh/kubernetes,JacobTanenbaum/kubernetes,k82cn/kubernetes,idvoretskyi/kubernetes,fabriziopandini/kubernetes,Acidburn0zzz/kubernetes,cofyc/kubernetes,micahhausler/kubernetes,micahhausler/kubernetes,matthyx/kubernetes,aledbf/kubernetes,hex108/kubernetes,mikedanese/kubernetes,feiskyer/kubernetes,shyamjvs/kubernetes,Clarifai/kubernetes,PiotrProkop/kubernetes,dlorenc/kubernetes,mkumatag/kubernetes,saad-ali/kubernetes,li-ang/kubernetes,kubernetes/kubernetes,alejandroEsc/kubernetes,jessfraz/kubernetes,cblecker/kubernetes,xychu/kubernetes,ping035627/kubernetes,nak3/kubernetes,BenTheElder/kubernetes,nckturner/kubernetes,Acidburn0zzz/kubernetes,alejandroEsc/kubernetes,kevin-wangzefeng/kubernetes,alejandroEsc/kubernetes,mkumatag/kubernetes,idvoretskyi/kubernetes,roberthbailey/kubernetes,deads2k/kubernetes,Clarifai/kubernetes,brendandburns/kubernetes,carlory/kubernetes,csrwng/kubernetes,liggitt/kubernetes,wongma7/kubernetes,warmchang/kubernetes,k82/kubernetes,hex108/kubernetes,pires/kubernetes,joelsmith/kubernetes,PI-Victor/kubernetes,jingxu97/kubernetes,zhangmingld/kubernetes,chrislovecnm/kubernetes,zhouhaibing089/kubernetes,fanzhangio/kubernetes,sanjeevm0/kubernetes,weiwei04/kubernetes,nikhita/kubernetes,dixudx/kubernetes,k82/kubernetes,mYmNeo/kubernetes,monopole/kubernetes,spzala/kubernetes,kitt1987/kubernetes,mfojtik/kubernetes,kpgriffith/kubernetes,kitt1987/kubernetes,tpepper/kubernetes,BenTheElder/kubernetes,PI-Victor/kubernetes,jsafrane/kubernetes,yujuhong/kubernetes,jagosan/kubernetes,jessfraz/kubernetes,coolsvap/kubernetes,soltysh/kubernetes,Clarifai/kubernetes,ping035627/kubernetes,liggitt/kubernetes,k82cn/kubernetes,k82/kubernetes,tpepper/kubernetes,dereknex/kubernetes,nak3/kubernetes,BenTheElder/kubernetes,sdminonne/kubernetes,iterion/kubernetes,coolsvap/kubernetes,jdef/kubernetes,dims/kubernetes,chrislovecnm/kubernetes,mfojtik/kubernetes,mkumatag/kubernetes,sanjeevm0/kubernetes,MikeSpreitzer/kubernetes,zhangmingld/kubernetes,jsafrane/kubernetes,liggitt/kubernetes,thockin/kubernetes,feiskyer/kubernetes,idvoretskyi/kubernetes,saad-ali/kubernetes,mengqiy/kubernetes,csrwng/kubernetes,pires/kubernetes,krmayankk/kubernetes,kubernetes/kubernetes,wongma7/kubernetes,mfojtik/kubernetes,mkumatag/kubernetes,fanzhangio/kubernetes,mikebrow/kubernetes,yujuhong/kubernetes,fanzhangio/kubernetes,gnufied/kubernetes,jingxu97/kubernetes,andrewrynhard/kubernetes,iameli/kubernetes,x13n/kubernetes,mosoft521/kubernetes,JacobTanenbaum/kubernetes,tpepper/kubernetes,iameli/kubernetes,tpepper/kubernetes,iterion/kubernetes,rafax/kubernetes,dlorenc/kubernetes,xychu/kubernetes,MikeSpreitzer/kubernetes,krmayankk/kubernetes,enj/kubernetes,lojies/kubernetes,Clarifai/kubernetes,cmluciano/kubernetes,monopole/kubernetes,aledbf/kubernetes,verult/kubernetes,carlory/kubernetes,x13n/kubernetes,stevesloka/kubernetes,dereknex/kubernetes,chrislovecnm/kubernetes,wongma7/kubernetes,spzala/kubernetes,mahak/kubernetes,weiwei04/kubernetes,idvoretskyi/kubernetes,humblec/kubernetes,stevesloka/kubernetes,k82cn/kubernetes,kitt1987/kubernetes,olivierlemasle/kubernetes,krmayankk/kubernetes,openshift/kubernetes,verb/kubernetes,yujuhong/kubernetes,nckturner/kubernetes,Acidburn0zzz/kubernetes,soltysh/kubernetes,olivierlemasle/kubernetes,jingxu97/kubernetes,dlorenc/kubernetes,dixudx/kubernetes,jagosan/kubernetes,jsafrane/kubernetes,roberthbailey/kubernetes,ii/kubernetes,monopole/kubernetes,soltysh/kubernetes,olivierlemasle/kubernetes,rnaveiras/kubernetes,cofyc/kubernetes,cmluciano/kubernetes,xychu/kubernetes,stevesloka/kubernetes,andrewrynhard/kubernetes,mengqiy/kubernetes,li-ang/kubernetes,fanzhangio/kubernetes,chrislovecnm/kubernetes,pires/kubernetes,xlgao-zju/kubernetes,deads2k/kubernetes,joelsmith/kubernetes,JacobTanenbaum/kubernetes,fabriziopandini/kubernetes,matthyx/kubernetes,nckturner/kubernetes,k82cn/kubernetes,saad-ali/kubernetes,lojies/kubernetes,rnaveiras/kubernetes,tengqm/kubernetes,kubernetes/kubernetes,dixudx/kubernetes,iterion/kubernetes,ingvagabund/kubernetes,zhouhaibing089/kubernetes,thockin/kubernetes,mfojtik/kubernetes,nikhita/kubernetes,Acidburn0zzz/kubernetes,pires/kubernetes,ping035627/kubernetes,spzala/kubernetes,mfojtik/kubernetes,roberthbailey/kubernetes,joelsmith/kubernetes,ii/kubernetes,liggitt/kubernetes,coolsvap/kubernetes,brendandburns/kubernetes,warmchang/kubernetes,kitt1987/kubernetes,iterion/kubernetes,zhangmingld/kubernetes,hex108/kubernetes,jsafrane/kubernetes,nckturner/kubernetes,cofyc/kubernetes,zhouhaibing089/kubernetes,sanjeevm0/kubernetes,spzala/kubernetes,alejandroEsc/kubernetes,jessfraz/kubernetes,nak3/kubernetes,PI-Victor/kubernetes,wongma7/kubernetes,k82cn/kubernetes,MikeSpreitzer/kubernetes,zhangmingld/kubernetes,hex108/kubernetes,chestack/kubernetes,kevin-wangzefeng/kubernetes,x13n/kubernetes,hex108/kubernetes,saad-ali/kubernetes,monopole/kubernetes,PI-Victor/kubernetes,carlory/kubernetes,kpgriffith/kubernetes,tengqm/kubernetes,openshift/kubernetes,bparees/kubernetes,krmayankk/kubernetes,wongma7/kubernetes,weiwei04/kubernetes,thockin/kubernetes,joelsmith/kubernetes,rnaveiras/kubernetes,mikebrow/kubernetes,krmayankk/kubernetes,jdef/kubernetes,zhangmingld/kubernetes,kpgriffith/kubernetes,fabriziopandini/kubernetes,stevesloka/kubernetes,krmayankk/kubernetes,jessfraz/kubernetes,csrwng/kubernetes,iameli/kubernetes,nak3/kubernetes,rrati/kubernetes,aledbf/kubernetes,matthyx/kubernetes,bparees/kubernetes,verult/kubernetes,tengqm/kubernetes,kpgriffith/kubernetes,BenTheElder/kubernetes,warmchang/kubernetes,warmchang/kubernetes,ravilr/kubernetes,dereknex/kubernetes,PiotrProkop/kubernetes,PI-Victor/kubernetes,mYmNeo/kubernetes,kubernetes/kubernetes,rnaveiras/kubernetes,jagosan/kubernetes,bparees/kubernetes,tpepper/kubernetes,cofyc/kubernetes,hex108/kubernetes,Acidburn0zzz/kubernetes,sdminonne/kubernetes,verult/kubernetes,JacobTanenbaum/kubernetes,liggitt/kubernetes,mikedanese/kubernetes,rrati/kubernetes,mYmNeo/kubernetes,mosoft521/kubernetes,k82/kubernetes,andrewrynhard/kubernetes,andrewrynhard/kubernetes,enj/kubernetes,spzala/kubernetes,dims/kubernetes,mengqiy/kubernetes,coolsvap/kubernetes,weiwei04/kubernetes,jagosan/kubernetes,cofyc/kubernetes,dixudx/kubernetes,mYmNeo/kubernetes,kevin-wangzefeng/kubernetes,brendandburns/kubernetes,verult/kubernetes,GulajavaMinistudio/kubernetes,jdef/kubernetes,iterion/kubernetes,mosoft521/kubernetes,roberthbailey/kubernetes,saad-ali/kubernetes,humblec/kubernetes,MikeSpreitzer/kubernetes,chrislovecnm/kubernetes,tengqm/kubernetes,rrati/kubernetes,jingxu97/kubernetes,ingvagabund/kubernetes,ravilr/kubernetes,humblec/kubernetes,verb/kubernetes,brendandburns/kubernetes,mengqiy/kubernetes,dlorenc/kubernetes,li-ang/kubernetes,rafax/kubernetes,zhouhaibing089/kubernetes,feiskyer/kubernetes,dlorenc/kubernetes,fanzhangio/kubernetes,xlgao-zju/kubernetes,gnufied/kubernetes,rrati/kubernetes,jagosan/kubernetes,cmluciano/kubernetes,JacobTanenbaum/kubernetes,enj/kubernetes,GulajavaMinistudio/kubernetes,chrislovecnm/kubernetes,csrwng/kubernetes,JacobTanenbaum/kubernetes,micahhausler/kubernetes,bparees/kubernetes,x13n/kubernetes,nak3/kubernetes,mosoft521/kubernetes,dixudx/kubernetes,ravilr/kubernetes,openshift/kubernetes,dereknex/kubernetes,yujuhong/kubernetes,mahak/kubernetes,mikebrow/kubernetes,lojies/kubernetes,Clarifai/kubernetes,PI-Victor/kubernetes,linux-on-ibm-z/kubernetes,deads2k/kubernetes,GulajavaMinistudio/kubernetes,shyamjvs/kubernetes,humblec/kubernetes,jackfrancis/kubernetes,weiwei04/kubernetes,stevesloka/kubernetes,shyamjvs/kubernetes,enj/kubernetes,PiotrProkop/kubernetes,cblecker/kubernetes,sanjeevm0/kubernetes,cblecker/kubernetes,csrwng/kubernetes,li-ang/kubernetes,yujuhong/kubernetes,warmchang/kubernetes,micahhausler/kubernetes,PiotrProkop/kubernetes,pires/kubernetes,ii/kubernetes,saad-ali/kubernetes,olivierlemasle/kubernetes,linux-on-ibm-z/kubernetes,mkumatag/kubernetes,andrewrynhard/kubernetes,nikhita/kubernetes,shyamjvs/kubernetes,brendandburns/kubernetes,GulajavaMinistudio/kubernetes,andrewrynhard/kubernetes,carlory/kubernetes,li-ang/kubernetes,jackfrancis/kubernetes,cofyc/kubernetes,ingvagabund/kubernetes,cblecker/kubernetes,jdef/kubernetes,verb/kubernetes,Clarifai/kubernetes,verult/kubernetes,tpepper/kubernetes,mikebrow/kubernetes,dlorenc/kubernetes,ingvagabund/kubernetes,ii/kubernetes,ii/kubernetes,deads2k/kubernetes,mikedanese/kubernetes,chestack/kubernetes,coolsvap/kubernetes,idvoretskyi/kubernetes,openshift/kubernetes,iterion/kubernetes,feiskyer/kubernetes,xlgao-zju/kubernetes,ping035627/kubernetes,iameli/kubernetes,sdminonne/kubernetes,jessfraz/kubernetes,linux-on-ibm-z/kubernetes,mikebrow/kubernetes,sanjeevm0/kubernetes,linux-on-ibm-z/kubernetes,lojies/kubernetes,dims/kubernetes,humblec/kubernetes,Acidburn0zzz/kubernetes,jackfrancis/kubernetes,feiskyer/kubernetes,mahak/kubernetes,rafax/kubernetes,k82/kubernetes,roberthbailey/kubernetes,chestack/kubernetes