Reduce the number of databases created by default.

Should still be sufficient for ERP5 unit tests: largest test uses 3 DB, and
we want to run 10 tests in parallel.

stack/erp5/buildout.cfg

@@ -184,7 +184,7 @@ context =
 [template-mariadb]
 < = download-base
 filename = instance-mariadb.cfg.in
-md5sum = 8f4883b0b3f01515a2e3b9ed59f55497
+md5sum = 8e8ee86a972b2393327b1e4656cf837b
 
 [template-zope]
 < = download-base

stack/erp5/instance-mariadb.cfg.in

@@ -106,7 +106,7 @@ mysql-base-directory = {{ parameter_dict['mariadb-location'] }}
 [mariadb-instance]
 # Options
 user = user
-parallel-test-database-amount = {{ slapparameter_dict.get('test-database-amount', 100) }}
+parallel-test-database-amount = {{ slapparameter_dict.get('test-database-amount', 30) }}
 database = erp5
 test-user = erp5_test
 test-database = erp5_test