output spdlogs as json

common/cpp/include/logger/logger.h

common/cpp/include/unittests/MockLogger.h

common/cpp/src/logger/CMakeLists.txt

common/cpp/src/logger/fluentd_sink.cpp

common/cpp/src/logger/logger.cpp

common/cpp/src/logger/spd_logger.cpp

common/cpp/src/logger/spd_logger.h

common/cpp/unittests/logger/test_logger.cpp

config/fluentd/fluentd.conf

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

producer/api/src/receiver_discovery_service.cpp

receiver/CMakeLists.txt

receiver/src/statistics.cpp

receiver/src/statistics.h

receiver/src/statistics_sender_fluentd.cpp

receiver/src/statistics_sender_fluentd.h

receiver/src/statistics_sender_influx_db.cpp

receiver/unittests/test_statistics.cpp

receiver/unittests/test_statistics_sender_fluentd.cpp

receiver/unittests/test_statistics_sender_influx_db.cpp