fix bug: wrong assign

ubuntu_base/vc_node.py

@@ -411,6 +411,7 @@ def proceed_self_stabilizing_VC():
                 is_ids_deployed = True
                 IdsOpportunistic.ids_queue.put((node.myid, time.time(), is_ids_deployed))
                 print("IDS Deployment request")
+                old_time_converge = node.converge_time
             elif is_ids_deployed and node.state == State.DECIDED_NOT_VC and (time.time() - node.converge_time) > CONVERGE_TIME_THRESHOLD:
                 is_ids_deployed = False
                 IdsOpportunistic.ids_queue.put((node.myid, time.time(), is_ids_deployed))