sensor.get_data() returns shifted daily consumption

[saroele]

As the method does not convert the index to local time, it gets days in UTC. Therefore, the values are shifted by 1 or 2 hours for Brussels.

[JrtPec]

• Add a field called timezone for every site in the Houseprint sheet, set it to Europe/Brussels
• Add a timezone attribute to the site class
• Adapt the houseprint parser so it will add the timezone to the site.
• Add something like if self.site.timezone is not None: data = data.tz_convert(self.site.timezone) to sensor.get_data(), right after the call to tmpo.