add substream name and timestamp to substream info, done with receiver and producer

common/cpp/include/common/data_structs.h

common/cpp/src/data_structs/data_structs.cpp

common/cpp/src/database/mongodb_client.cpp

common/cpp/src/database/mongodb_client.h

common/cpp/unittests/data_structs/test_data_structs.cpp

consumer/api/cpp/include/consumer/data_broker.h

consumer/api/cpp/src/server_data_broker.cpp

consumer/api/cpp/src/server_data_broker.h

consumer/api/cpp/unittests/test_server_broker.cpp

consumer/api/python/asapo_consumer.pxd

consumer/api/python/asapo_consumer.pyx.in

...er/src/request_handler/request_handler_db_stream_info.cpp

...s/request_handler/test_request_handler_db_stream_info.cpp

receiver/unittests/statistics/test_receiver_statistics.cpp

tests/automatic/consumer/consumer_api/consumer_api.cpp

tests/automatic/producer/python_api/producer_api.py