Fix more deprecation warnings (#7778)

* Remove setting up an hbmqtt broker

* Don't pass loop to web.Application in tests

* Use .query instead of deprecated .GET for aiohttp requests

* Fix closing file resource

* Do not use asyncio mark

* Notify.html5 - PyJWT: Use options to disable verify

* Yamaha: Test was still using deprecated ip

* Remove pytest-asyncio

homeassistant/components/binary_sensor/mystrom.py

@@ -38,7 +38,7 @@ class MyStromView(HomeAssistantView):
     @asyncio.coroutine
     def get(self, request):
         """The GET request received from a myStrom button."""
-        res = yield from self._handle(request.app['hass'], request.GET)
+        res = yield from self._handle(request.app['hass'], request.query)
         return res
 
     @asyncio.coroutine