Group service / dynamic handling (#7971)

* Add Service to group

* Finish service

* Add service functions

* fix lint

* Address paulus comments

* fix lint & cleanup

* fix lint

* fix lint

* fix lint p3

* add test for check group

* add more tests

* fix lint

* Update service.yaml

* Fix order for tests

* Fix comment

* Fix test

* Fix tests

* Fix name in tests

* Fix view

* Fix default value

* Fix lint

* Fix key error

* add name

* migrate component entity

* fix tests

* fix import

* migrate device tracker

* fix lint

* fix bug

* fix logic

* fix lint

* fix tests

* fix generator

* fix group

* fix other tests.

* Not need to load group on first stage anymore.

* fix service

* add more group depency

* fix tests

* Revert "fix tests"

This reverts commit 35a922b3a8.

* Real fix

* fix test p2

* fix test p3

* fix test p4

* fix test p5

* fix test p6

* fix lint

* fix test p7

* Rename attribute

* fix group test

* fix bug

* fix flagy tests

* fix service.yaml

* fix lint

tests/components/device_tracker/test_init.py

@@ -429,6 +429,7 @@ class TestComponentsDeviceTracker(unittest.TestCase):
         with assert_setup_component(1, device_tracker.DOMAIN):
             assert setup_component(self.hass, device_tracker.DOMAIN,
                                    TEST_PLATFORM)
+            self.hass.block_till_done()
 
         state = self.hass.states.get(device_tracker.ENTITY_ID_ALL_DEVICES)
         self.assertIsNotNone(state)