Change node role tag to match master pattern
Change node role tag to match master pattern

It's not currently used, and we hadn't updated it to match the better
pattern.

k8s.io/role=master can only be in one role
k8s.io/role/master=1 allows for multiple roles

andrewsykim/kops,kubernetes/kops,leandrocr/kops,sp-borja-juncosa/kops,mad01/kops,ikropotov/kops,robinpercy/kops,zytek/kops,pdh/kops,zytek/kops,reactiveops/kops,luomiao/kops,DualSpark/kops,sp-borja-juncosa/kops,WillemMali/kops,DualSpark/kops,austinmoore-/kops,blakebarnett/kops,aledbf/kops,tsupertramp/kops,mad01/kops,robinpercy/kops,gambol99/kops,aledbf/kops,andrewsykim/kops,luomiao/kops,reactiveops/kops,jnewland/kops,gambol99/kops,faraazkhan/kops,ikropotov/kops,sethpollack/kops,dacohen/kops,dacohen/kops,luomiao/kops,mad01/kops,zytek/kops,sethpollack/kops,kubernetes/kops,chrislovecnm/kops,blakebarnett/kops,blakebarnett/kops,andrewsykim/kops,BradErz/kops,aledbf/kops,robinpercy/kops,BradErz/kops,WillemMali/kops,leandrocr/kops,dacohen/kops,kubernetes/kops,faraazkhan/kops,kris-nova/kops,tsupertramp/kops,kris-nova/kops,pdh/kops,chrislovecnm/kops,justinsb/kops,faraazkhan/kops,luomiao/kops,dacohen/kops,jnewland/kops,tsupertramp/kops,MadDogTechnology/kops,justinsb/kops,BradErz/kops,aledbf/kops,tsupertramp/kops,chrislovecnm/kops,pdh/kops,reactiveops/kops,austinmoore-/kops,leandrocr/kops,blakebarnett/kops,sethpollack/kops,zytek/kops,kris-nova/kops,DualSpark/kops,MadDogTechnology/kops,austinmoore-/kops,DualSpark/kops,MadDogTechnology/kops,kris-nova/kops,sp-borja-juncosa/kops,jnewland/kops,WillemMali/kops,sethpollack/kops,mad01/kops,faraazkhan/kops,ikropotov/kops,leandrocr/kops,sp-borja-juncosa/kops,gambol99/kops,robinpercy/kops,austinmoore-/kops,BradErz/kops,WillemMali/kops,andrewsykim/kops,pdh/kops,reactiveops/kops,justinsb/kops,MadDogTechnology/kops,ikropotov/kops,gambol99/kops,chrislovecnm/kops