MQTT: WIP, subscibed topics have no "Retained" attribute.
Allow subscribed and published data models to be different, by removing "Retained" column.
#!/usr/bin/env python
# -*- coding: utf-8 -*-
# This file is part of Beremiz
# Copyright (C) 2019: Edouard TISSERANT
#
# See COPYING file for copyrights details.
from svghmi.svghmi import *