Revert "Revert "Remove 0/0 replicasets before counting active SHAs, so that wait-for-deployment doesn't wait for 0/0 replicasets to disappear. PAASTA-17186""
Revert "Revert "Remove 0/0 replicasets before counting active SHAs, so that wait-for-deployment doesn't wait for 0/0 replicasets to disappear. PAASTA-17186""

This reverts commit 61d6be44eef592f7782ffba3218824cc60524e7d.

Yelp/paasta,Yelp/paasta