Start working at configuration files

CMakeModules/testing_cpp.cmake

common/cpp/CMakeLists.txt

common/cpp/include/json_parser/json_parser.h

common/cpp/src/data_structs/CMakeLists.txt

common/cpp/src/data_structs/data_structs.cpp

common/cpp/src/database/CMakeLists.txt

common/cpp/src/json_parser/CMakeLists.txt

common/cpp/src/json_parser/json_string_parser.cpp

common/cpp/src/json_parser/rapid_json.cpp

common/cpp/src/json_parser/rapid_json.h

common/cpp/unittests/json_parser/test_json_string_parser.cpp

worker/api/cpp/CMakeLists.txt