stack/erp5: Make test runners use symbolic name for mariadb connections.

This is more representative of how this is supposed to be used.

stack/erp5/buildout.hash.cfg

@@ -90,7 +90,7 @@ md5sum = 0ac4b74436f554cd677f19275d18d880
 
 [template-zope]
 filename = instance-zope.cfg.in
-md5sum = 9c580be982d8c63ec06fc273ef3cb971
+md5sum = e7776de36718bd7e27a4defe7d2e5b29
 
 [template-balancer]
 filename = instance-balancer.cfg.in

stack/erp5/instance-zope.cfg.in

@@ -500,7 +500,7 @@ wrapper-path = ${buildout:bin-directory}/runTestSuite
 {%     do connection_string_list.append(
          '%s@%s:%s %s %s' % (
            parsed_url.path.lstrip('/'),
-           parsed_url.hostname,
+           'erp5-catalog-0',
            parsed_url.port,
            parsed_url.username,
            parsed_url.password,