Add ha non destructive tests for HA mysql
Next tests was added:
* test that verify data replication for mysql cluster or galera
* test that verify cluster state for mysql cluster
* test that verify galera quorum state
* test to verify that count of tables for each openstack database
  is the same on each node
Delete second line of the end of file
Applied review comment for ya mysql tests
Merge pull request #87 from Mirantis/ha-non-distructive

Looks fine. Approved =)