read string from file

common/cpp/include/common/data_structs.h

common/cpp/include/json_parser/json_parser.h

common/cpp/include/system_wrappers/io.h

common/cpp/include/system_wrappers/system_io.h

common/cpp/include/unittests/MockIO.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_parser.cpp

common/cpp/src/json_parser/rapid_json.cpp

common/cpp/src/json_parser/rapid_json.h

common/cpp/src/system_io/system_io.cpp

common/cpp/src/system_io/system_io_linux.cpp

common/cpp/src/system_io/system_io_windows.cpp

common/cpp/unittests/data_structs/test_data_structs.cpp

common/cpp/unittests/json_parser/test_json_parser.cpp

examples/worker/getnext_broker/check_linux.sh

examples/worker/getnext_broker/check_windows.bat

tests/mongo_db/insert/insert_mongodb.cpp