Comment 3 for bug 1356362

Reviewed: https://review.openstack.org/115974
Committed: https://git.openstack.org/cgit/openstack/ironic/commit/?id=d7cdc75841b729b274bf816fc64382aa963c1704
Submitter: Jenkins
Branch: master

commit d7cdc75841b729b274bf816fc64382aa963c1704
Author: Yuriy Zveryanskyy <email address hidden>
Date: Thu Aug 21 10:35:49 2014 +0300

    Control extra space for images conversion in image_cache

    Size of image converted to raw format can be growing up to virtual_size.
    This patch adds new _fetch_to_raw function to image_cache which try to
    free extra space for image conversion if needed.

    Closes-Bug: #1356362
    Change-Id: I69712b078113ef0640859389ef4ab9039135f612