[COMMON][MARIADB] Align conf with camunda needs
Camunda has given a guide in order to configure camunda
(https://docs.camunda.org/manual/latest/user-guide/process-engine/database/mariadb-galera-configuration/).
Applying it to ONAP camunda configuration.
gitlint-ignore: B1, body-max-line-length
Issue-ID: INT-1883
Signed-off-by: Sylvain Desbureaux <sylvain.desbureaux@orange.com>
Change-Id: Ie0cb1c70e4271496ffd5e51ce1d816785f88689f
(cherry picked from commit
7d3ddcdcdcbb00c495a5ac93df9cf30e8f929963)