image unhandled when delete VM

[hougangliu]

In nova /compute/manager.py :def _delete_instance()
There is a line "image = instance['image_ref']", but the variable 'image' is not used in this method any more.

In addition, when deleting a vm with state "shelved" or "shelved-offloaded", the vm's snapshot like ‘shelved image’ should also be removed. I think delete a vm should handle this case

[Sahid Orentino (sahid-ferdjaoui)]

I'm going to push a small fix to remove the not necessary variable "image" and then push something with tests about shelved vm to close this bug.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/61462

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/61462
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=48729259c570d73d7c35228718ecc4e9bb258e36
Submitter: Jenkins
Branch: master

commit 48729259c570d73d7c35228718ecc4e9bb258e36
Author: Sahid Orentino Ferdjaoui <email address hidden>
Date: Wed Dec 11 15:28:32 2013 +0000

    Shelve: The snapshot should be removed when delete instance.

    When deleting a vm with state "shelved" or "shelved-offloaded",
    the vm's snapshot like ‘shelved image’ should also be removed.

    Change-Id: Ie9b0f8dec8f85351ef188f70e0fe9414e332aafe
    Closes-Bug: #1259462