Don't force ig image change on cluster upgrade if it is custom.
Don't force ig image change on cluster upgrade if it is custom.

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