Unit tests fail after upgrading to keystoneclient 0.4.0

[Yuriy Zveryanskyy]

Traceback (most recent call last):
  File "ironic/tests/api/test_acl.py", line 62, in test_authenticated
    'X-Roles': 'admin'})
  File "ironic/tests/api/test_acl.py", line 45, in get_json
    **param)
  File "ironic/tests/api/base.py", line 127, in get_json
    expect_errors=expect_errors)
  File "/home/yzveryanskyy/ironic/.tox/py27/local/lib/python2.7/site-packages/webtest/app.py", line 206, in get
    expect_errors=expect_errors)
  File "/home/yzveryanskyy/ironic/.tox/py27/local/lib/python2.7/site-packages/webtest/app.py", line 515, in do_request
    self._check_status(status, res)
  File "/home/yzveryanskyy/ironic/.tox/py27/local/lib/python2.7/site-packages/webtest/app.py", line 544, in _check_status
    res)
AppError: Bad response: 401 Unauthorized (not 200 OK or 3xx redirect for http://localhost/v1/nodes/1be26c0b-03f2-4d2e-ae87-c02d7f33c123)
'Authentication required'

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/51177

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/51177
Committed: http://github.com/openstack/ironic/commit/ba76d594442c23d9a5aa7a257e0cb1f94f23a4e1
Submitter: Jenkins
Branch: master

commit ba76d594442c23d9a5aa7a257e0cb1f94f23a4e1
Author: Roman Prykhodchenko <email address hidden>
Date: Fri Oct 11 13:26:58 2013 +0300

    Fix datetime format in FakeCache

    Since keystoneclient v0.4.0 auth_token middleware requires
    the expiratin date and time of an authentication token to
    be in ISO format.

    This patch updates FakeCache which is used for unit tests
    for ACL to generate expiration date and time according to
    ISO 8601.

    Closes-bug: #1238591
    Change-Id: Ie6e542fe1acc7658ca62db5dfdfd949ff15c8373