Galera back to functional for HA Controller / Juno

Includes commits from https://github.com/redhat-openstack/astapor/pull/394

The goal here is to get the HA controller back to running state for further Juno-related development work.  This works for me.  openstack-status looks good (so galera is functioning) with the exception of a glance error which I have not yet debugged but should be unrelated to this PR.

Caveats/things to fix later:
* ssl will not work (crt's are not included in galera rpm)
* do to lack of clustercheck, haproxy will not detect when
  a node loses quorum and should not receive requests