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

@@ -25,7 +25,7 @@ sub get_form {
 sub hal_from_item {
     my ($self, $c, $item, $form) = @_;
     my $type = "callforwards";
-    
+
     my $prov_subs = $item->provisioning_voip_subscriber;
     die "no provisioning_voip_subscriber" unless $prov_subs;
 
@@ -245,6 +245,7 @@ sub update_item {
         }
     }
 
+    $item->discard_changes;
     return $item;
 }