update quota sets API does not handle all fail cases

[ling-yun]

The update quota sets API should check whether 'quota_set' is in body.

The code to update quota sets does the following:

for key in body['quota_set'].keys():

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/55849

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/55849
Committed: http://github.com/openstack/cinder/commit/2ed2f3aff8eee70e02eb995780af292057cfcad4
Submitter: Jenkins
Branch: master

commit 2ed2f3aff8eee70e02eb995780af292057cfcad4
Author: ling-yun <email address hidden>
Date: Mon Nov 11 22:00:03 2013 +0800

    Update quota-set throw 500 error

    The server doesn't check whether the parameter "quota_set" or
    "quota_class_set" is in request
    body.So the 500 error has been thrown.

    We should catch the KeyError and transfer the KeyError to
    400(HTTPBadRequest) instead of 500.

    Change-Id: I01260c77efa50324f3d203888689cdb1e94d2c21
    Closes-Bug: #1249971

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/havana
Review: https://review.openstack.org/64008

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/64008
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=ed41b6804a8eafb710f8faec425e22ebe0b85ca9
Submitter: Jenkins
Branch: stable/havana

commit ed41b6804a8eafb710f8faec425e22ebe0b85ca9
Author: ling-yun <email address hidden>
Date: Mon Nov 11 22:00:03 2013 +0800

    Update quota-set throw 500 error

    The server doesn't check whether the parameter "quota_set" or
    "quota_class_set" is in request
    body.So the 500 error has been thrown.

    We should catch the KeyError and transfer the KeyError to
    400(HTTPBadRequest) instead of 500.

    Closes-Bug: #1249971
    (cherry picked from commit 2ed2f3aff8eee70e02eb995780af292057cfcad4)
    Change-Id: I01260c77efa50324f3d203888689cdb1e94d2c21