Multi-host deploy fails on Cluster name change

[spartan782]

If you change the cluster name in the RockNSM config file and redeploy rock it will get stuck at this stage because it tries to restart a single node at a time which fails to join a cluster as there are not 3 masters up when the first box restarts.

https://github.com/rocknsm/rock/blob/ade6f4ac2c5018b2a6b383431be4356ac900d5f5/roles/elasticsearch/tasks/restart.yml#L25-L33