Add mapping for mariadb rdo package

Mariadb package in RDO repository is mariadb-galera-server, but
this name is mapped to MariaDB-Galera-server because of
mariadb installed from mariadb.org.

To avoid mapping conflicts mariadb-rdo uses virtual package name
mariadb-rdo-galera-server which is mapped to mariadb-galera-server.

Change-Id: Idf77d91876baeb81d89eb688808b892ece2bf19a

elements/redhat-common/bin/map-packages

@@ -50,6 +50,7 @@ package_map = {
     'lm-sensors': 'lm_sensors',
     'mariadb-galera-server': 'MariaDB-Galera-server',
     'mariadb-client': 'MariaDB-client',
+    'mariadb-rdo-galera-server': 'mariadb-galera-server',
     'mysql-client-5.5': 'mariadb',
     'mysql-server-5.5': 'mariadb-server',
     'nagios-plugins-basic': 'nagios-plugins-all',