Migrated some tests from MiXiM into INET.
Ported connectionManager tests from MiXiM to INET.
Ported basePhyLayer tests from MiXiM to INET.
Fixed test file's name.
Added Decider80211MultiChannel, should be probably merged into base class.
Fixed handling initial radio state parameter.
Changed ChannelSenseRequest to be a message because it's not a network packet.
Added error handling and default value for default bitrate in DetailedRadio.
Changed enum to be public.