The user for replication is "replication", not "replica"

Now MariaDB replication is working, just confirmed it by
looking to containers activity (previously it was idle).

Now time to check why PHPUnit isn't detecting that, it should
so we immediately know when replication is not working.

runner/main/modules/docker-database/mariadb.d/replica/docker-entrypoint-initdb.d/10_replicate.sh

@@ -29,8 +29,8 @@ mysql -u root -pmoodle moodle < /tmp/moodle.sql
 mysql -u root -pmoodle moodle << EOSQL
 CHANGE MASTER TO
   MASTER_HOST='${DBHOST}',
-  MASTER_USER='replica',
-  MASTER_PASSWORD='replica',
+  MASTER_USER='replication',
+  MASTER_PASSWORD='replication',
   MASTER_LOG_FILE='$replfile',
   MASTER_LOG_POS=$position;
 START SLAVE;