delete_stream in Python and integration tests

CHANGELOG.md

CMakeModules/testing_cpp.cmake

broker/src/asapo_broker/database/mongodb.go

broker/src/asapo_broker/database/mongodb_test.go

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

common/cpp/src/data_structs/data_structs.cpp

consumer/api/cpp/src/consumer_impl.cpp

consumer/api/python/asapo_consumer.pxd

consumer/api/python/asapo_consumer.pyx.in

producer/api/cpp/src/producer_impl.cpp

producer/api/python/asapo_producer.pxd

producer/api/python/asapo_producer.pyx.in

...ver/src/request_handler/request_handler_delete_stream.cpp

...ts/request_handler/test_request_handler_delete_stream.cpp

tests/automatic/consumer/consumer_api/check_linux.sh

tests/automatic/consumer/consumer_api/check_windows.bat

tests/automatic/consumer/consumer_api/consumer_api.cpp

tests/automatic/consumer/consumer_api_python/check_linux.sh

.../automatic/consumer/consumer_api_python/check_windows.bat

tests/automatic/consumer/consumer_api_python/consumer_api.py