some refactoring

comIF/OBSW_ComInterface.py

comIF/OBSW_Ethernet_ComIF.py

comIF/OBSW_Serial_ComIF.py

config/OBSW_Config.py

obsw_tmtc_client.py

sendreceive/OBSW_CommandSenderReceiver.py

sendreceive/OBSW_MultipleCommandsSenderReceiver.py

sendreceive/OBSW_SequentialSenderReceiver.py

sendreceive/OBSW_SingleCommandSenderReceiver.py

sendreceive/obsw_tm_listener.py

tm/OBSW_PusTm.py

tm/OBSW_TmPacket.py

tm/OBSW_TmService1.py

tm/OBSW_TmService3.py

tm/OBSW_TmService5.py

utility/OBSW_TmTcPrinter.py

utility/obsw_tmtc_printer.py