integration test producer/reviever, refactoring

CMakeLists.txt

CMakeModules/testing_cpp.cmake

CMakeModules/testing_go.cmake

common/cpp/src/system_io/system_io_linux.cpp

producer/api/src/producer_impl.cpp

receiver/src/main.cpp

receiver/src/network_producer_peer.cpp

receiver/src/network_producer_peer.h

receiver/src/network_producer_peer_impl.cpp

receiver/src/receiver.cpp

receiver/src/receiver.h

receiver/src/receiver_error.h

receiver/unittests/test_receiver.cpp

tests/CMakeLists.txt

tests/producer_receiver/CMakeLists.txt

tests/producer_receiver/transfer_single_file/CMakeLists.txt

tests/producer_receiver/transfer_single_file/check_linux.sh

.../producer_receiver/transfer_single_file/check_windows.bat

tests/system_io/CMakeLists.txt

tests/system_io/ip_tcp_network/CMakeLists.txt