Add index for "portal_type=... and reference=..." queries.

Those queries are very common (user lookup in acl_users, for example).

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_create_catalog.xml

@@ -106,7 +106,7 @@ CREATE TABLE `catalog` (\n
   KEY `Title` (`title`),\n
   KEY `Reference` (`reference`),\n
   KEY `relative_url` (`relative_url`),\n
-  KEY `Portal Type` (`portal_type`),\n
+  KEY `Portal Type` (`portal_type`, `reference`),\n
   KEY `opportunity_state` (`opportunity_state`),\n
   KEY `validation_state_portal_type` (`validation_state`, `portal_type`),\n
   KEY `simulation_state_portal_type` (`simulation_state`, `portal_type`),\n

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/bt/revision

-235
\ No newline at end of file
+236
\ No newline at end of file