Allows TEST_VERBOSE to be set to enable verbose messaging.
Allows TEST_VERBOSE to be set to enable verbose messaging.

dronekit/dronekit-python,duststorm/dronekit-python,diydrones/dronekit-python,MaxQu/dronekit-python,duststorm/dronekit-python,trishhyles/dronekit-python,MaxQu/dronekit-python,dronekit/dronekit-python,diydrones/dronekit-python,K-Carrington/dronekit-python,hamishwillee/dronekit-python,hamishwillee/dronekit-python,trishhyles/dronekit-python,K-Carrington/dronekit-python