Add async_safe annotation (#3688)

* Add async_safe annotation

* More async_run_job

* coroutine -> async_save

* Lint

* Rename async_safe -> callback

* Add tests to core for different job types

* Add one more test with different type of callbacks

* Fix typing signature for callback methods

* Fix callback service executed method

* Fix method signatures for callback

homeassistant/components/automation/sun.py

@@ -4,12 +4,12 @@ Offer sun based automation rules.
 For more details about this automation rule, please refer to the documentation
 at https://home-assistant.io/components/automation/#sun-trigger
 """
-import asyncio
 from datetime import timedelta
 import logging
 
 import voluptuous as vol
 
+from homeassistant.core import callback
 from homeassistant.const import (
     CONF_EVENT, CONF_OFFSET, CONF_PLATFORM, SUN_EVENT_SUNRISE)
 from homeassistant.helpers.event import async_track_sunrise, async_track_sunset
@@ -31,10 +31,10 @@ def async_trigger(hass, config, action):
     event = config.get(CONF_EVENT)
     offset = config.get(CONF_OFFSET)
 
-    @asyncio.coroutine
+    @callback
     def call_action():
         """Call action with right context."""
-        hass.async_add_job(action, {
+        hass.async_run_job(action, {
             'trigger': {
                 'platform': 'sun',
                 'event': event,