Do not spin forever if kubectl drain races with other removal
Do not spin forever if kubectl drain races with other removal

In https://github.com/kubernetes/kubernetes/pull/47450 we stopped
returning an error if a pod disappeared before we could remove it.
Instead we just continue to spin forever. Return "success" if a pod
disappeared before we actually removed it.

https://bugzilla.redhat.com/1473777
bug 1473777

HubSpot/kubernetes,HubSpot/kubernetes,HubSpot/kubernetes,HubSpot/kubernetes,HubSpot/kubernetes