erp5_core: rely on ERP5User property sheet to identify users

product/ERP5/bootstrap/erp5_core/ExtensionTemplateItem/portal_components/extension.erp5.StandardSecurity.py

@@ -175,7 +175,11 @@ def asSecurityGroupIdSet(category_dict, key_sort=sorted):
     except KeyError:
       continue
     for category_value, is_child_category in category_list:
-      if category_value.getPortalType() == 'Person':
+      if 'ERP5User' in getattr(
+        category_value.getTypeInfo(),
+        'getTypePropertySheetList',
+        lambda: ()
+      )():
         user_name = category_value.Person_getUserId()
         if user_name is not None:
           user_list.append(user_name)