Refactored NetworkProducerPeer

common/cpp/include/common/error.h

common/cpp/include/system_wrappers/io.h

...ples/producer/dummy-data-producer/dummy_data_producer.cpp

producer/api/include/producer/producer.h

producer/api/src/producer.cpp

producer/api/unittests/test_producer.cpp

receiver/CMakeLists.txt

receiver/src/network_producer_peer.cpp

receiver/src/network_producer_peer.h

receiver/src/network_producer_peer_handlers.cpp

receiver/src/network_producer_peer_impl.cpp

receiver/src/network_producer_peer_impl.h

receiver/src/network_producer_peer_impl_functions.cpp

receiver/src/network_producer_peer_impl_handlers.cpp

receiver/src/receiver.cpp

receiver/src/receiver_error.h

receiver/unittests/test_network_producer_peer.cpp

receiver/unittests/test_network_producer_peer_impl.cpp