deactivate update broker token

ml/thing.py

@@ -407,8 +407,8 @@ def receive():
                     target=self.broker.receive,
                     args=(self.__endpoint, self.__on_broker_callback),
                 ).start()
-            else:
-                self.broker.update_token(self.access_token)
+            #else:
+            #    self.broker.update_token(self.access_token)
 
     def __on_broker_callback(self, ch, method, properties, body):
         """Parses body (content of a S3I-B message) and delegates the