fetch_to_volume_format calls copy_volume using the wrong parameter

[wuyuting]

When creating a volume from an image, if qemu-img is not installed, fetch_to_volume_format will call volume_utils.copy_volume to copy image to volume. copy_volume need the size of image in megabyte, but fetch_to_volume_format call it using size in bytes.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/150232

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/150232
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=549144f754a8b3adb9d7fdfa8f8f9ee186a52f1e
Submitter: Jenkins
Branch: master

commit 549144f754a8b3adb9d7fdfa8f8f9ee186a52f1e
Author: wuyuting <email address hidden>
Date: Tue Jan 27 02:50:28 2015 +0800

    Fetch_to_volume_format calls copy_volume using wrong parameter

    When creating a volume from an image, if qemu-img is not installed,
    fetch_to_volume_format will call volume_utils.copy_volume to copy
    image to volume. Copy_volume need the size of image in megabyte,
    but fetch_to_volume_format call it using size in bytes.

    Change-Id: Ia3b0f9168235a977a12232e27a5755ad11ec18f5
    Closes-Bug: #1414867