Comment 4 for bug 1214985

Reviewed: https://review.openstack.org/43161
Committed: http://github.com/openstack/nova/commit/5c95824191855b0012268f641e5e738888b8d13f
Submitter: Jenkins
Branch: master

commit 5c95824191855b0012268f641e5e738888b8d13f
Author: Matt Riedemann <email address hidden>
Date: Tue Aug 20 21:14:41 2013 -0700

    powervm: actually remove files after migration

    The powervm driver is attempting to clean up compressed image gz files
    in the migration flow but the rm command being issued doesn't use the
    --force option, so the files are piling up on the backing hypervisor.

    This patch properly removes the files like in other parts of the powervm
    code (see blockdev.py for example) and fixes the tests so the
    _remove_file method is actually tested.

    Closes-Bug: #1214985

    Change-Id: I82919aa20447230e317c13f51bdf1c204a2eca39