## 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**
* Add unit test for hddtemp sensor.
* Remove sample fixture and include it in the code.
* Add test to raise coverage.
* Fix bug when host is not reachable.
* Minor code cleanups.
* More code cleanups.
* Add support for multiple disks.
* Fix LINT error.
* Make disk config optional to not break existing installations.
* Change state handling as per request by @fabaff.
Ville Skyttä
cgtobi
Fabian Affolter
Paulus Schoutsen