Mqtt Connection failed
I have correctly set up the PAI add on, when I start the add on, in the log I see all the parameters of the alarm control panel (sensors, zones, users).

I set in the Mqtt part of PAI the host_mqtt (127.0.0.1), mqtt_username and mqtt_password (the same ones I have in the Mosquitto add on).

Nel log, ho questo: 

```
WARNING - PAI.paradox.interfaces.mqtt.core - Connection failed, retrying: Connection refused(111)
```