rename broker -> consumer in APIs

CHANGELOG.md

consumer/api/cpp/CMakeLists.txt

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

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

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

consumer/api/cpp/src/consumer.cpp

consumer/api/cpp/src/consumer_impl.cpp

consumer/api/cpp/src/consumer_impl.h

consumer/api/cpp/src/tcp_consumer_client.cpp

consumer/api/cpp/src/tcp_consumer_client.h

consumer/api/cpp/unittests/test_consumer_api.cpp

consumer/api/cpp/unittests/test_consumer_impl.cpp

consumer/api/cpp/unittests/test_tcp_consumer_client.cpp

consumer/api/python/asapo_consumer.pxd

consumer/api/python/asapo_consumer.pyx.in

examples/consumer/CMakeLists.txt

examples/consumer/getnext/CMakeLists.txt

examples/consumer/getnext/CMakeLists_separate.in

examples/consumer/getnext/Makefile.in

examples/consumer/getnext/check_linux.sh