Add notifications for groups and roles

[OpenStack Infra]

https://review.openstack.org/48524
commit 13583ee852fbb5ed99f76b1eeb8be92fc9d965d4
Author: Steve Martinelli <email address hidden>
Date: Thu Sep 26 15:21:31 2013 -0500

    Add notifications for groups and roles

    Currently, we only issue notifications for projects, users and
    domains. This patch will add support to issue notifications for
    groups and roles. Notifications will be sent on create, update
    and delete.

    I've also updated tests to include tests for projects and users.

    DocImpact
    Change-Id: I23eac9afb2a227e5739dc25395705597a92eb23c
    fixes: bug 1231220

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/119952

[OpenStack Infra (hudson-openstack)]

Change abandoned by Tom Fifield (<email address hidden>) on branch: master
Review: https://review.openstack.org/119952
Reason: based on email discussion, and patch discussion, it seems like this patch won't move forward