MQTT: Don't print on connected, debug log instead

Author: jonnor

msgflo/msgflo.py

@@ -271,7 +271,7 @@ def _message_pump_greenthread(self):
     return 
 
   def _on_connect(self, client, userdata, flags, rc):
-      print("Connected with result code" + str(rc))
+      logging.debug("Connected with result code" + str(rc))
 
       # Subscribe to queues for inports
       subscriptions = [] # ("topic", QoS)