new WFJT launch schema and cleanup

awx/api/views.py

@@ -2946,7 +2946,10 @@ class WorkflowJobTemplateLaunch(WorkflowsEnforcementMixin, RetrieveAPIView):
     always_allow_superuser = False
 
     def update_raw_data(self, data):
-        obj = self.get_object()
+        try:
+            obj = self.get_object()
+        except PermissionDenied:
+            return data
         extra_vars = data.pop('extra_vars', None) or {}
         if obj:
             for v in obj.variables_needed_to_start: