Promote k8s 1.12.9 from alpha -> stable
Promote k8s 1.12.9 from alpha -> stable

aledbf/kops,robinpercy/kops,aledbf/kops,justinsb/kops,kubernetes/kops,robinpercy/kops,robinpercy/kops,kubernetes/kops,aledbf/kops,robinpercy/kops,justinsb/kops,justinsb/kops,aledbf/kops,kubernetes/kops