Merge branch 'speedup_get_streams' into 'develop'

broker/src/asapo_broker/database/mongodb.go

broker/src/asapo_broker/database/mongodb_streams.go

broker/src/asapo_broker/database/mongodb_test.go

broker/src/asapo_broker/database/streams_test.go

broker/src/asapo_broker/server/get_commands_test.go

broker/src/asapo_broker/server/get_streams.go

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

consumer/api/python/asapo_consumer.pxd

consumer/api/python/asapo_consumer.pyx.in

deploy/build_env/services-linux/Dockerfile

deploy/build_env/services-linux/supervisord.conf