add tests, fix bug

common/cpp/include/common/networking.h

common/cpp/src/database/mongodb_client.cpp

examples/pipeline/in_to_out/check_linux.sh

examples/pipeline/in_to_out/check_windows.bat

examples/pipeline/in_to_out/in_to_out.cpp

...ples/producer/dummy-data-producer/dummy_data_producer.cpp

producer/api/src/producer_impl.cpp

producer/api/unittests/test_producer_impl.cpp

tests/automatic/full_chain/simple_chain/check_linux.sh

tests/manual/receiver_debug_local/authorizer.json.tpl

tests/manual/receiver_debug_local/authorizer.nmd

tests/manual/receiver_debug_local/clean_db.sh

tests/manual/receiver_debug_local/discovery.json.tpl

tests/manual/receiver_debug_local/discovery.nmd

tests/manual/receiver_debug_local/nginx.conf.tpl

tests/manual/receiver_debug_local/nginx.nmd

tests/manual/receiver_debug_local/receiver.json

tests/manual/receiver_debug_local/start_dummyproducer.sh

tests/manual/receiver_debug_local/start_services.sh

tests/manual/receiver_debug_local/stop_services.sh