Comment 3 for bug 1461767

Listed below is the summary of conversation with Steve on this defect:

1. We can do away without the Keystonemiddleware changes. As the Keystonemiddleware.audit already sends user and project information as part of the event , ceilometer can extract info from there. Thus, https://review.openstack.org/#/c/198555/ can be abandoned.

2. Instead of changing the Event schema to add user_id and project_id as the base attributes, I added these as Traits by defining them in the events_definition file for the audit event types.

3 . I re-used the rbac.enforce method and made some changes so that it is able to better utilize the oslo policy engine.