finished client

common/cpp/include/common/data_structs.h

common/cpp/src/data_structs/data_structs.cpp

common/cpp/unittests/data_structs/test_data_structs.cpp

receiver/src/receiver_data_server/tcp_server.cpp

receiver/src/request_handler_authorize.cpp

worker/api/cpp/CMakeLists.txt

worker/api/cpp/src/server_data_broker.cpp

worker/api/cpp/src/server_data_broker.h

worker/api/cpp/src/tcp_client.cpp

worker/api/cpp/src/tcp_client.h

worker/api/cpp/src/tcp_connection_pool.cpp

worker/api/cpp/src/tcp_connection_pool.h

worker/api/cpp/unittests/mocking.h

worker/api/cpp/unittests/test_tcp_client.cpp

worker/api/cpp/unittests/test_tcp_connection_pool.cpp