xattr cache driver returns iso8601 format timestamps

[Paul Bourke]

The xattr driver for the caching middleware is returning it's last_modified/last_accessed times in iso8601 format rather than a timestamp.

This is inconsistent with the sqlite driver and causing the glance-cache-manage command to fall over when using the xattr driver:

"""
ubuntu@devstack:/opt/stack/glance$ glance-cache-manage list-cached
Found 4 cached images...
ID Last Accessed (UTC) Last Modified (UTC) Size Hits
------------------------------------ ------------------- ------------------- -------------- ----------
Failed to show cached images. Got error:
a float is required
"""

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/35474

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/35474
Committed: http://github.com/openstack/glance/commit/fd9b4cd43d5533dd8051cf68d1b27cf70cd2f3cd
Submitter: Jenkins
Branch: master

commit fd9b4cd43d5533dd8051cf68d1b27cf70cd2f3cd
Author: Paul Bourke <email address hidden>
Date: Tue Jul 2 18:21:17 2013 +0000

    Fix 'glance-cache-manage list-cached' for xattr

    The xattr driver for the caching middleware was returning it's
    last_modified/last_accessed times in iso8601 format rather than a
    timestamp.

    This was inconsistent with the sqlite driver and caused the
    glance-cache-manage command to fall over when using the xattr driver.

    Fixes bug 1197360

    Change-Id: Ie72dcd9f41f7a3b7405cda9fe28e1e468fcc1bef