backup-delete removes backup from database

[Michael Kerrin]

After creating a backup, and removing the backup I looked in the backup table in the database and there are no rows.

We shouldn't delete the row but instead set the deleted & deleted_at fields in the database

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/27072

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/27072
Committed: http://github.com/openstack/cinder/commit/a4ba17b668bd893d50fd4f3a5453da89966a77e3
Submitter: Jenkins
Branch: master

commit a4ba17b668bd893d50fd4f3a5453da89966a77e3
Author: Michael Kerrin <email address hidden>
Date: Wed Apr 17 15:36:28 2013 +0000

    Deleting a backup removed the backup record from database

    Instead we should be marking the backup as deleted so that we have an audit
    of all the backups. Backups are now marked deleted in the way that volumes
    are.

    Fixes bug: 1169943
    Fixes bug: 1169857

    Change-Id: I52c603be138c0f1d6d411d167977041255ac9053

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/28205

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/28205
Committed: http://github.com/openstack/cinder/commit/2e3c1cd77b3d523c48ff4a086cccf68fd11c4c19
Submitter: Jenkins
Branch: stable/grizzly

commit 2e3c1cd77b3d523c48ff4a086cccf68fd11c4c19
Author: Michael Kerrin <email address hidden>
Date: Wed Apr 17 15:36:28 2013 +0000

    Dont delete backup record from database

    Instead we should be marking the backup as deleted so that we have an audit
    of all the backups. Backups are now marked deleted in the way that volumes
    are.

    Fixes bug: 1169943
    Fixes bug: 1169857

    Change-Id: I52c603be138c0f1d6d411d167977041255ac9053
    (cherry picked from commit a4ba17b668bd893d50fd4f3a5453da89966a77e3)