## 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**
* Lazy loading of service descriptions
* Fix tests
* Load YAML in executor
* Return a copy of available services to allow mutations
* Remove lint
* Add zha/services.yaml
* Only cache descriptions for known services
* Remove lint
* Remove description loading during service registration
* Remove description parameter from async_register
* Test async_get_all_descriptions
* Remove lint
* Fix typos from multi-edit
* Remove unused arguments
* Remove unused import os
* Remove unused import os, part 2
* Remove unneeded coroutine decorator
* Only use executor for loading files
* Cleanups suggested in review
* Increase test coverage
* Fix races in existing tests
* add ads hub, light and switch
* add binary sensor prototype
* switch: use adsvar for connection
* fix some issues with binary sensor
* fix binary sensor
* fix all platforms
* use latest pyads
* fixed error with multiple binary sensors
* add sensor
* add ads sensor
* clean up after shutdown
* ads component with platforms switch, binary_sensor, light, sensor
add locking
poll sensors at startup
update state of ads switch and light
update ads requirements
remove update() from constructors on ads platforms
omit ads coverage
ads catch read error when polling
* add ads service
* add default settings for use_notify and poll_interval
* fix too long line
* Fix style issues
* no pydocstyle errors
* Send and receive native brightness data to ADS device to prevent issues with math.floor reducing brightness -1 at every switch
* Enable non dimmable lights
* remove setting of self._state in switch
* remove polling
* Revert "remove polling"
This reverts commit 7da420f823.
* add service schema, add links to documentation
* fix naming, cleanup
* re-remove polling
* use async_added_to_hass for setup of callbacks
* fix comment.
* add callbacks for changed values
* use async_add_job for creating device notifications
* set should_poll to False for all platforms
* change should_poll to property
* add service description to services.yaml
* add for brigthness not being None
* put ads component in package
* Remove whitespace
* omit ads package
