parse broker response into fileinfos

common/cpp/include/json_parser/json_parser.h

common/cpp/src/json_parser/json_parser.cpp

common/cpp/src/json_parser/rapid_json.cpp

common/cpp/src/json_parser/rapid_json.h

worker/api/cpp/src/server_data_broker.cpp

worker/api/cpp/src/server_data_broker.h

worker/api/cpp/unittests/test_server_broker.cpp