versionedobject requirement need to update

[Lan Qi song]

The gate failed because of the wrong versionedobject, we need to update the requirement file.

The error log:

 File "/opt/stack/magnum/.tox/py27/local/lib/python2.7/site-packages/unittest2/loader.py", line 384, in _get_module_from_name
    __import__(name)
  File "magnum/tests/__init__.py", line 21, in <module>
    cfg.CONF.import_opt('enable_authentication', 'magnum.api.auth')
  File "/opt/stack/magnum/.tox/py27/local/lib/python2.7/site-packages/oslo_config/cfg.py", line 2038, in import_opt
    __import__(module_str)
  File "magnum/api/auth.py", line 20, in <module>
    from magnum.api.middleware import auth_token
  File "magnum/api/middleware/__init__.py", line 13, in <module>
    from magnum.api.middleware import auth_token
  File "magnum/api/middleware/auth_token.py", line 17, in <module>
    from magnum.common import exception
  File "magnum/common/exception.py", line 42, in <module>
    'oslo_versionedobjects.exception')
  File "/opt/stack/magnum/.tox/py27/local/lib/python2.7/site-packages/oslo_config/cfg.py", line 2039, in import_opt
    self._get_opt_info(name, group)
  File "/opt/stack/magnum/.tox/py27/local/lib/python2.7/site-packages/oslo_config/cfg.py", line 2384, in _get_opt_info
    raise NoSuchOptError(opt_name, group)
NoSuchOptError: no such option: fatal_exception_format_errors
Non-zero exit code (2) from test listing.
error: testr failed (3)

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/176159
Committed: https://git.openstack.org/cgit/openstack/magnum/commit/?id=4ba1f1947e73145f1a868702ebfbbf20d84cccfd
Submitter: Jenkins
Branch: master

commit 4ba1f1947e73145f1a868702ebfbbf20d84cccfd
Author: Lan Qi song <email address hidden>
Date: Wed Apr 22 09:53:24 2015 +0800

    Update requirement to fix gate error

    Change-Id: I6155c81556ef525cfdd97568794e87053dad8b03
    Closes-Bug: #1446930