* Add device_class on charging remaining time
Set `device_class to `duration` on the `charging_remaining_time` entity in the Renault integration.
I had some issues showing this property on my dashboard, and setting this fixed it. The recommendation to open an issue against the original integration in these kinds of cases came from [here](https://community.home-assistant.io/t/how-to-format-a-card-to-show-hours-instead-of-seconds/425473/7).
* Update test const to add duration
* fix other cars
* Update test_sensor.ambr
* add duration in ambr
Emma Vanbrabant
Joost Lekkerkerker
epenet