api.helper: extract and return is_retry flag from event

Fetch flag marking a job retry from event and
return it along with node and `is_hierarchy` flag.

Signed-off-by: Jeny Sadadia <[email protected]>

Author: Jeny Sadadia

kernelci/api/helper.py

@@ -130,7 +130,7 @@ def receive_event_node(self, sub_id):
                 continue
             if all(self.pubsub_event_filter(sub_id, obj)
                    for obj in [node, event]):
-                return node, event.get('is_hierarchy')
+                return node, event.get('is_hierarchy'), event.get('is_retry')
 
     def _find_container(self, field, node):
         """