Bootstrap / Component setup async (#6264)

* Bootstrap / Entiy setup async

* Cleanup add_job stuff / return task/future object

* Address paulus comments / part 1

* fix install pip

* Cleanup bootstrap / move config stuff to config.py

* Make demo async

* Further bootstrap improvement

* Address Martin's comments

* Fix initial tests

* Fix final tests

* Fix bug with prepare loader

* Remove no longer needed things

* Log error when invalid config

* More cleanup

* Cleanups platform events & fix lint

* Use a non blocking add_entities callback for platform

* Fix Autoamtion is setup befor entity is ready

* Better automation fix

* Address paulus comments

* Typo

* fix lint

* rename functions

* fix tests

* fix test

* change exceptions

* fix spell

homeassistant/scripts/check_config.py

@@ -26,8 +26,8 @@ MOCKS = {
     'load*': ("homeassistant.config.load_yaml", yaml.load_yaml),
     'get': ("homeassistant.loader.get_component", loader.get_component),
     'secrets': ("homeassistant.util.yaml._secret_yaml", yaml._secret_yaml),
-    'except': ("homeassistant.bootstrap.async_log_exception",
-               bootstrap.async_log_exception),
+    'except': ("homeassistant.config.async_log_exception",
+               config_util.async_log_exception),
     'package_error': ("homeassistant.config._log_pkg_error",
                       config_util._log_pkg_error),
 }
@@ -211,7 +211,7 @@ def check(config_path):
 
     def mock_except(ex, domain, config,  # pylint: disable=unused-variable
                     hass=None):
-        """Mock bootstrap.log_exception."""
+        """Mock config.log_exception."""
         MOCKS['except'][1](ex, domain, config, hass)
         res['except'][domain] = config.get(domain, config)