Restore 30 test database default value.

Was accidentally lost, and documented as the intended value - though it is
not.

software/erp5/instance-mariadb-input-schema.json

@@ -40,7 +40,7 @@
     },
     "test-database-amount": {
       "description": "The number of test databases to create, adding auto-generated entries to database-list",
-      "default": 0,
+      "default": 30,
       "minimum": 0,
       "type": "integer"
     },

stack/erp5/buildout.cfg

@@ -171,7 +171,7 @@ context =
 [template-mariadb]
 < = download-base
 filename = instance-mariadb.cfg.in
-md5sum = 2d3bc3bb5e79519897c96acbdcc4ece6
+md5sum = cc6469a092d0b09008dca6507ae4cb02
 
 [template-kumofs]
 < = download-base

stack/erp5/instance-mariadb.cfg.in

@@ -3,7 +3,7 @@
 {% macro section(name) %}{% do part_list.append(name) %}{{ name }}{% endmacro -%}
 {% set use_ipv6 = slapparameter_dict.get('use-ipv6', False) -%}
 {% set database_list = slapparameter_dict.get('database-list', [{'name': 'erp5', 'user': 'user', 'password': 'insecure'}]) -%}
-{% for database_count in range(slapparameter_dict.get('test-database-amount', 0)) -%}
+{% for database_count in range(slapparameter_dict.get('test-database-amount', 30)) -%}
 {%   do database_list.append({'name': 'erp5_test_' ~ database_count, 'user': 'testuser_' ~ database_count, 'password': 'testpassword' ~ database_count}) -%}
 {% endfor -%}
 {% set catalog_backup = slapparameter_dict.get('catalog-backup', {}) -%}