* Store all entities in dict
* Use stored unique id to select if to create entity or not
* Remove unnecessary init
* Change so same physical sensor doesnt try to create multiple battery sensors
Change so groups get created properly
* Add controls in tests that entities are logged correctly
* Improve gateway tests
* Harmonize all tests to use the same gateway initialization method
* Improve scene tests
* Add gateway resync call to platform tests
* Forgot to change switch tests to use common gateway method
* Improve event tests
