Fix endless recursion

devices/clients/sst_client.py

@@ -183,7 +183,7 @@ class UDP_Receiver(Thread):
         self.stream_on = False
         logging.info("Sent shutdown to UDP thread for {}:{}".format(self.host, self.port))
 
-        self.join(timeout)
+        super().join(timeout)
 
         if self.isAlive():
             # happens if timeout is hit