ERP5Security/ERP5GroupManager: don't ignore errors

This plugin already does its own error handling, so we don't really
need to let PAS catch other errors. This way, if an error occurs during
getPortalSecurityCategoryMapping ( which calls ERP5Type_getSecurityCategoryMapping )
we don't have a successful authentication with no groups.

product/ERP5Security/ERP5GroupManager.py

@@ -83,6 +83,8 @@ class ERP5GroupManager(BasePlugin):
   """ PAS plugin for dynamically adding Groups
   based on Assignments in ERP5
   """
+  _dont_swallow_my_exceptions = True
+
   meta_type = 'ERP5 Group Manager'
 
   security = ClassSecurityInfo()