paho-mqtt Update V2.0.0

[FraMartel]

Hi!

The paho-mqtt update seems to break the mqtt connexion. I patched the interfaces/mqtt/core.py file by:

• Adding "CallbackAPIVersion" to the paho import (line 11)
• Changing the client creation (from line 55) to the following:

self.client = Client(
            callback_api_version=CallbackAPIVersion.VERSION1,
            client_id="pai"+os.urandom(8).hex(),
            protocol=protocol_map.get(str(cfg.MQTT_PROTOCOL), MQTTv311),
            transport=cfg.MQTT_TRANSPORT,
        )

This seems to be resolving the mqtt not connecting. I did NOT test this further.

This is my first time writing something on github so let me know if I should do something else (like creating an issue?).

Thanks!