Endpoint grouping extension does handle deletion callbacks

[Dolph Mathews]

If a project or endpoint group is deleted, the endpoint grouping extension should respond by deleting associated data. Instead, stale data remains in the backend.

[Dolph Mathews (dolph)]

https://review.openstack.org/#/c/117723/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/117723
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=d176359e6e6ac75ff416f994521d907557d566a2
Submitter: Jenkins
Branch: master

commit d176359e6e6ac75ff416f994521d907557d566a2
Author: Bob Thyne <email address hidden>
Date: Fri Aug 29 01:37:21 2014 -0700

    Add delete notification to endpoint grouping

    Add delete notification to endpoint grouping so that if a project
    or endpoint group is deleted this will automatically force the
    deletion of the related project endpoint group association.

    Closes-Bug: 1365169
    Change-Id: Ic67eaf52ec220bc4ace32a7625af643b3f0818d6