MT#16121 PUT /api/callforwards/id json-hal response broken

+due to optimisations in hal_from_item
+journal affected as well, thats how we found this
+so the last failing journal testcase should be fixed

Change-Id: I33824cc92c4a4895d2dd3afe8bd963f442f556f5

lib/NGCP/Panel/Role/API/CallForwards.pm

@@ -245,6 +245,7 @@ sub update_item {
         }
     }
 
+    $item->discard_changes;
     return $item;
 }