fix windows warnings

CMakeLists.txt

common/cpp/src/system_io/system_io.cpp

producer/api/src/producer_impl.cpp

producer/api/src/receiver_discovery_service.cpp

producer/api/src/request_handler_filesystem.cpp

producer/api/src/request_handler_tcp.cpp

producer/api/unittests/test_request_handler_filesystem.cpp

producer/api/unittests/test_request_handler_tcp.cpp

producer/event_monitor_producer/src/main_eventmon.cpp

receiver/src/request.cpp

receiver/src/request_handler_file_write.cpp

receiver/src/statistics.cpp

worker/api/cpp/src/folder_data_broker.cpp

worker/api/cpp/src/tcp_client.cpp

worker/api/cpp/unittests/test_tcp_client.cpp

worker/api/python/setup.py.in

worker/tools/folder_to_db/src/folder_db_importer.cpp