get rid of default stream in C++

CHANGELOG.md

common/cpp/include/asapo/common/data_structs.h

consumer/api/cpp/include/asapo/consumer/consumer.h

consumer/api/cpp/src/consumer_impl.cpp

consumer/api/cpp/src/consumer_impl.h

consumer/api/cpp/unittests/test_consumer_impl.cpp

examples/consumer/getnext/getnext.cpp

examples/pipeline/in_to_out/in_to_out.cpp

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

producer/api/cpp/include/asapo/producer/producer.h

producer/api/cpp/src/producer_impl.cpp

producer/api/cpp/src/producer_impl.h

producer/api/cpp/unittests/test_producer.cpp

producer/api/cpp/unittests/test_producer_impl.cpp

producer/event_monitor_producer/src/main_eventmon.cpp

tests/automatic/consumer/consumer_api/consumer_api.cpp

...sumer/next_multithread_broker/next_multithread_broker.cpp

tests/manual/performance_broker_receiver/getlast_broker.cpp