unit test for AsyncioTransport rewritten for constructor and setup
unit test for AsyncioTransport rewritten for constructor and setup

The idea is removing the dependancies, which in this case are the loop
and the device objects, and testing only their role with
AsyncioTransport

skimpax/python-rfxcom,AndyA13/python-rfxcom,d0ugal-archive/python-rfxcom,skimpax/python-rfxcom,d0ugal-archive/python-rfxcom,AndyA13/python-rfxcom,kalfa/python-rfxcom,kalfa/python-rfxcom