Allow TriggerOnPortalUpdate to work also on derived classes: i.e a trigger defined for the class 'Ticket' will be called when a 'UserRequest' (derived from Ticket) will be updated from the portal.
Allow TriggerOnPortalUpdate to work also on derived classes: i.e a trigger defined for the class 'Ticket' will be called when a 'UserRequest' (derived from Ticket) will be updated from the portal.

git-svn-id: efba275c3291004ad656db059d43564e37a1fae9@1509 60fe80c7-c1f8-43be-bd32-c3e8feb7a3b0

dflaven/itop,dflaven/itop,dflaven/itop,dflaven/itop,dflaven/itop