Rebalance stuck after delta recovery

Node was auto-failed over and added back via delta recovery w/ rebalance.

There was also a firewall issue after failover that blocked all nodes from each other but that had been resolved prior to the add back and rebalance.

Logs are:
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-34-218-25-100.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-35-155-216-180.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-52-24-191-55.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-52-26-62-134.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-52-32-153-180.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-52-33-249-200.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-54-200-249-23.us-west-2.compute.amazonaws.com.zip
https://s3.amazonaws.com/cb-engineering/perry/rebalancestuck/collectinfo-2018-05-14T102508-ns_1%40ec2-54-71-68-161.us-west-2.compute.amazonaws.com.zip