[dev][keystone][keystonemiddleware] Keystone CADF notifications for rabbitmq

Hello, I am trying to make to work CADF notifying for nova_api and other modules into rabbitmq. I tried to use keystonemiddleware ( https://docs.openstack.org/keystonemiddleware/queens/audit.html), but no notifications appeared. The only thing that is sending CADF notifications into rabbitmq is keystone. I assume that is because keystone has its own notifier. (keystone/notifications.py) Do you have some idea about this problem? Which approach is correct in this case? Thank you for your help, Ondrej