Doug Szumski 0353dba39a Add support for configuring MariaDB
This enables:

* Disabling MariaDB if external MariaDB is used
* Merging additional configuration with the default Kolla
  provided configuration for MariaDB

Story: 2002704
Task: 22545
Change-Id: I345f56d50dd64b516d563a025ec877bc4a4034e1
2018-06-27 13:42:46 +01:00
..
2018-06-27 13:42:46 +01:00