Comment 2 for bug 1200769

Reviewed: https://review.openstack.org/37962
Committed: http://github.com/openstack/keystone/commit/639d62cdbacbe3c3da5183137d900d82bea5389d
Submitter: Jenkins
Branch: master

commit 639d62cdbacbe3c3da5183137d900d82bea5389d
Author: Brant Knudson <email address hidden>
Date: Fri Jul 19 15:10:51 2013 -0500

    Use assignment_api rather than assignment

    When normal dependency injection is used the variables
    are named like "xxx_api".
    This change makes it so that the identity backend and
    drivers use "assignment_api" rather than "assignment"
    so it will be easier to switch to normal dependency
    injection.

    Part of fix for bug 1200769

    Change-Id: I7805b338c48d57ca1922bb622a3f474f2341f4ac