Comment 3 for bug 927291

Reviewed: https://review.openstack.org/3887
Committed: http://github.com/openstack/keystone/commit/f0f8ddeaa8923af615fad9171c96ea1ef1f5968d
Submitter: Jenkins
Branch: redux

commit f0f8ddeaa8923af615fad9171c96ea1ef1f5968d
Author: Vishvananda Ishaya <email address hidden>
Date: Tue Feb 7 23:07:10 2012 -0800

    Ensures duplicate users and tenants can't be made

     * adds test for duplicate names and ids for backends
     * also adds test for rename duplicates and changing ids
     * makes kvs backend raise an exception if duplicate is requested
     * ensures kvs backend doesn't allow update of id
     * makes sure that kvs is reset between tests
     * cleans up a few imports
     * fixes bug 927291
     * fixes bug 928659

    Change-Id: Ia6eb1961796cbde7ed57a75cd9394d77c88cf655