* 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
* system_log improvements
* Don't use ModuleNotFoundError which is 3.6+
* Don't use FrameSummary which was added in 3.5
* Don't trace stack for exception logs
* Handle test error in Python 3.4
Anders Melchiorsen