Don't allow invitations or adds from a group
Don't allow invitations or adds from a group

We will remove additional members on the next reconcile anyway, so no
point allowing other membership flows.

thockin/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,kubernetes/k8s.io,thockin/k8s.io,thockin/k8s.io,kubernetes/k8s.io,thockin/k8s.io