Comment 2 for bug 1222692

Reviewed: https://review.openstack.org/45635
Committed: http://github.com/openstack/cinder/commit/5aa6ca2e80631a32e429bcacbd031ddaa6e5bfb1
Submitter: Jenkins
Branch: master

commit 5aa6ca2e80631a32e429bcacbd031ddaa6e5bfb1
Author: Zhiteng Huang <email address hidden>
Date: Mon Sep 9 14:53:37 2013 +0800

    Fix Qos Specs association corner case

    Fix a corner case in associating QoS Specs with Volumt types that was
    not handled well: Raise HTTPBadRequest() to client if associate volume
    type, which is already associated one qos specs other than specified
    qos specs. Previously such operation will proceed without error which
    results overwriting original association.

    Also refactor DB API volume_type_qos_specs_get() to return qos specs
    in consistent dict format as other qos specs related APIs.

    Fix bug: # 1222692

    Change-Id: I9db66d1e3a7469620ba542f5387422685a2d828f