Promote 1.5.8 and 1.6.11 to stable channel
Promote 1.5.8 and 1.6.11 to stable channel

chrislovecnm/kops,andrewsykim/kops,justinsb/kops,blakebarnett/kops,andrewsykim/kops,andrewsykim/kops,mad01/kops,robinpercy/kops,kubernetes/kops,mad01/kops,andrewsykim/kops,blakebarnett/kops,robinpercy/kops,aledbf/kops,chrislovecnm/kops,aledbf/kops,mad01/kops,justinsb/kops,mad01/kops,gambol99/kops,chrislovecnm/kops,justinsb/kops,blakebarnett/kops,robinpercy/kops,kubernetes/kops,blakebarnett/kops,aledbf/kops,tsupertramp/kops,kubernetes/kops,chrislovecnm/kops,tsupertramp/kops,robinpercy/kops,gambol99/kops,tsupertramp/kops,gambol99/kops,tsupertramp/kops,aledbf/kops,gambol99/kops