actually add the task to the update chord

inventory_provider/tasks/worker.py

@@ -459,7 +459,8 @@ def update_entry_point(self):
                     (reload_lab_router_config_chorded.s(r)
                      for r in lab_routers),
                     empty_task.si('lab router tasks complete')
-                )
+                ),
+                collate_netconf_interfaces_all_cache.s().on_error(task_error_handler.s())
             ),
             final_task.si().on_error(task_error_handler.s())
         )()
@@ -1447,6 +1448,7 @@ def populate_poller_interfaces_cache(warning_callback=lambda s: None):
     r.set(all_cache_key, json.dumps(all_populated_interfaces))
 
 
+@app.task(base=InventoryTask, bind=True, name='collate_netconf_interfaces_all_cache')
 @log_task_entry_and_exit
 def collate_netconf_interfaces_all_cache(warning_callback=lambda s: None):
     """