erp5: Parameterise mariadb data directory

stack/erp5/buildout.hash.cfg

@@ -26,7 +26,7 @@ md5sum = d95e8500bdc72d1f40b97cc414656e7e
 
 [template-mariadb]
 filename = instance-mariadb.cfg.in
-md5sum = 591fe60e2f615c7690fa5078473b1b0a
+md5sum = fa6081255666cdd7fd971d3dc3919c29
 
 [template-kumofs]
 filename = instance-kumofs.cfg.in

stack/erp5/instance-mariadb.cfg.in

@@ -126,7 +126,8 @@ command = {{ parameter_dict['findutils-location'] }}/bin/find "${directory:maria
 ip = {{ ip }}
 port = {{ port }}
 socket = ${directory:run}/mariadb.sock
-data-directory = ${directory:srv}/mariadb
+{% set data_directory = slapparameter_dict.get('data-directory', '${directory:mariadb-data}') -%}
+data-directory = {{ data_directory }}
 tmp-directory = ${directory:tmp}
 etc-directory = ${directory:etc}
 pid-file = ${directory:run}/mariadb.pid