Scalability: Switch to deltaClusterSnapshot
Scalability: Switch to deltaClusterSnapshot

This massively speeds up checking predicates.

bskiba/autoscaler,mmerrill3/autoscaler,bskiba/autoscaler,bskiba/autoscaler,mmerrill3/autoscaler,mmerrill3/autoscaler,mmerrill3/autoscaler,kubernetes/autoscaler,kubernetes/autoscaler,kubernetes/autoscaler,kubernetes/autoscaler