CloudBees Replication Parent 2733

Under certain circumstances in a High Availability (HA) controller under load, a build that has been adopted after a replica exits might begin resuming promptly, but not immediately resume a running node step. If the corresponding agent comes online quickly, a pending queue item on the same replica as the one that adopted the build might start running on the agent, which was intended to be reserved for the build already running. These pending queue items are now blocked to allow the proper owner to complete the resumption.