Comment 6 for bug 1585275

As previously mentioned, we came up with a patch that moves galera to step 1, where there is less resource contention. We also then serialize DB schema upgrades. Refer to this patch:
https://github.com/trozet/opnfv-tht/commit/9bc4a4fc9412ee67075ed2421523d876bab5979a

18 virtual deployments with HA and Ceph on all nodes were run to test out these changes. 17/18 deployments passed. I believe these fixes (or some similar fix) should go into stable/mitaka for TripleO.