'pxe_preserve_ephemeral' leaking from $nova delete

[Lucas Alvares Gomes]

After successfully doing a "nova rebuild --preserve_ephemeral" I then issued a "nova delete" to delete the instance and I noticed that the 'pxe_preserve_ephemeral' parameter from the node.driver_info (set by the rebuild command) wasn't removed as part of the node tear_down, it should because now if I deploy another instance on that node it's going to preserve the ephemeral disk.

Logs: http://paste.openstack.org/show/79585/

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/92844

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/92844
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=3a395d774be9287cad84ccd7fad007e08546167c
Submitter: Jenkins
Branch: master

commit 3a395d774be9287cad84ccd7fad007e08546167c
Author: Lucas Alvares Gomes <email address hidden>
Date: Thu May 8 15:16:57 2014 +0100

    Fix 'pxe_preserve_ephemeral' parameter leakage

    Add 'pxe_preserve_ephemeral' to the list of parameters to be removed
    from the node when tearing it down to prevent it from leaking from one
    deploy to another.

    Closes-Bug: #1317527
    Change-Id: I83811126ec72ce46290fb4828a05ef0bbc2c2fd2