* Add tests for remove_route()
* Add tests for sanic/router.py
* Add tests for sanic/cookies.py
* Disable reset logging in test_logging.py
* Add tests for sanic/request.py
* Add tests for ContentRangeHandler
* Add tests for exception at response middleware
* Fix cached_handlers for ErrorHandler.lookup()
* Add test for websocket request timeout
* Add tests for getting cookies of StreamResponse, Remove some unused variables in tests/test_cookies.py
* Add tests for nested error handle
* Move serve_multiple, remove stop_events, fix tests
Moves serve_multiple out of the app, removes stop_event (adds a
deprecation warning, but it also wasn't doing anything) fixes
multiprocessing tests so that they don't freeze pytest's runner.
Other notes:
Also moves around some imports so that they are better optimized as
well.
* Re-add in stop_event, maybe it wasn't so bad!
* Get rid of unused warnings import
