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 35a922b3a8d00821a00d153997b7be57117de328.

* 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/helpers/test_entity_component.py

@@ -14,6 +14,7 @@ from homeassistant.helpers.entity import Entity, generate_entity_id
 from homeassistant.helpers.entity_component import (
     EntityComponent, DEFAULT_SCAN_INTERVAL, SLOW_SETUP_WARNING)
 from homeassistant.helpers import entity_component
+from homeassistant.setup import setup_component
 
 from homeassistant.helpers import discovery
 import homeassistant.util.dt as dt_util
@@ -76,6 +77,7 @@ class TestHelpersEntityComponent(unittest.TestCase):
 
     def test_setting_up_group(self):
         """Setup the setting of a group."""
+        setup_component(self.hass, 'group', {'group': {}})
         component = EntityComponent(_LOGGER, DOMAIN, self.hass,
                                     group_name='everyone')