* Fix mysensors connection task blocking setup
* Schedule the connection task without having the core track the task
to avoid blocking setup.
* Cancel the connection task, if not cancelled already, when
home assistant stops.
* Use done instead of cancelled
## Description:
More fixes flagged by pylint 2 that don't hurt to have before the actual pylint 2 upgrade (which I'll submit soon).
## Checklist:
- [ ] The code change is tested and works locally.
- [x] Local tests pass with `tox`. **Your PR cannot be merged unless tests pass**
Paulus Schoutsen
Ville Skyttä
Martin Hjelmare
Paulus Schoutsen