Image size won't be updated if locations are updated to empty

[Feilong Wang]

See https://github.com/openstack/glance/blob/master/glance/api/v2/images.py#L225

Based on current design, the image status will be updated to 'queued' if all locations are removed from the target image, but for now, the image size won't be updated. It doesn't make sense and will confuse the end user.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/64824

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/64824
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=a8ef64c4eccbc0639e0e7a81ff584287a4f9ddd0
Submitter: Jenkins
Branch: master

commit a8ef64c4eccbc0639e0e7a81ff584287a4f9ddd0
Author: Fei Long Wang <email address hidden>
Date: Fri Jan 3 11:01:16 2014 +0800

    Set image size to None after removing all locations

    Based on current design, the image size should be updated to
    None if there is no location assocaited with the image. This
    patch fixes this issue and introduces some related changes.

    Closes-Bug: #1263729

    Change-Id: I893468f1dc320ea9434f07c3a32f978cd5941b33