No cleanup done when file transfer fails with powervm driver

[ChangBo Guo(gcb)]

When deploye one instance with powervm driver , it will transfer image file to host , and l leave the file on host when image file transfer fails . Need clean the file in this situation .

see https://github.com/openstack/nova/blob/master/nova/virt/powervm/blockdev.py#L423
            if not output:
                LOG.error(_("Unable to get checksum"))
                raise exception.PowerVMFileTransferFailed()
            if source_cksum != output.split(' ')[0]:
                LOG.error(_("Image checksums do not match"))
                raise exception.PowerVMFileTransferFailed()

We need cleanup the failed file before raising exception.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/27534

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/27534
Committed: http://github.com/openstack/nova/commit/68cc1cd511298208dde59878bfbef474a3625c9f
Submitter: Jenkins
Branch: master

commit 68cc1cd511298208dde59878bfbef474a3625c9f
Author: Chang Bo Guo <email address hidden>
Date: Thu Apr 25 23:40:12 2013 -0700

    Clean up failed image transfers in instance spawn

    Boot one instance with powervm driver, will transfer the image
    file to host. Need clean up failed image transfers that may occur
    during instance spawn.

    Fixes bug #1173017

    Change-Id: Iff5ecd32e201333567a6a4de1d3796e78ea5dc0c

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/grizzly
Review: https://review.openstack.org/30885

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/30885
Committed: http://github.com/openstack/nova/commit/ee75c2970808e53bb849802d6ade2f9df2d76e0b
Submitter: Jenkins
Branch: stable/grizzly

commit ee75c2970808e53bb849802d6ade2f9df2d76e0b
Author: Chang Bo Guo <email address hidden>
Date: Wed May 29 06:18:39 2013 -0700

    Clean up failed image transfers in instance spawn

    Boot one instance with powervm driver, will transfer the image
    file to host. Need clean up failed image transfers that may occur
    during instance spawn.

    Fixes bug #1173017
    (cherry picked from commit 68cc1cd511298208dde59878bfbef474a3625c9f)

    Change-Id: Id06fa84bee63adc4af96a339526d75540978263f