* Set self._expired=True if expire_after specified * Added test_expiration_on_discovery_and_discovery_update_of_binary_sensor to mqtt/test_binary_sensor.py * Fixed flake8 error * Fixed isort error
* Set self._expired=True if expire_after specified * Added test_expiration_on_discovery_and_discovery_update_of_binary_sensor to mqtt/test_binary_sensor.py * Fixed flake8 error * Fixed isort error