Add new dynamic related keys for the reference property.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@22754 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Catalog/CatalogTool.py

@@ -864,7 +864,7 @@ class CatalogTool (UniqueObject, ZCatalog, CMFCoreCatalogTool, ActiveObject):
             # We have found a base_category
             end_key = '_'.join(splitted_key[i:])
             # accept only some catalog columns
-            if end_key in ('title', 'uid', 'description',
+            if end_key in ('title', 'uid', 'description', 'reference',
                            'relative_url', 'id', 'portal_type'):
               if strict:
                 related_key_list.append(