Nova unit tests spamming log output

[Russell Bryant]

The following commit caused a problem with nova unit tests. When you try to run the tests, the log output was being spammed to the console, instead of being caught by the FakeLogger.

commit f665d798234c19cccc148a178e94c3717ba8bd6e
Author: Russell Bryant <email address hidden>
Date: Fri Mar 22 14:10:07 2013 -0400

    Sync everything from oslo-incubator.

    Change-Id: If602b424086abb3edbd4703bc0e3befedbf37925

The specific change from oslo-incubator that cuased this is:

commit 9fe688a412d910e29fdf97fd0f97a7f815db6c8f
Author: Zhiteng Huang <email address hidden>
Date: Wed Mar 13 00:27:48 2013 +0800

    Initialize root logger in _setup_logging_from_conf()

    log.setup() doesn't really initialize root logger, therefore logging
    in 3rd party library such as stevedore doesn't work properly. This
    patch enable root logger initialization.

    Fix bug: # 1073241

    Change-Id: I6fa41b2ba41ff97ad0280f8774a26887d294423e

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/25320

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/25320
Committed: http://github.com/openstack/nova/commit/d6a9d38a0b7488dd77d3a01ae9c4171c271d7314
Submitter: Jenkins
Branch: master

commit d6a9d38a0b7488dd77d3a01ae9c4171c271d7314
Author: Russell Bryant <email address hidden>
Date: Mon Mar 25 18:05:02 2013 -0400

    set up FakeLogger for root logger.

    A recent change in openstack.common.log was made such that it
    initialized the root logger instead of the project specific logger,
    'nova' in this case. Update the unit tests for this to fix the problem
    where unit tests spam the console with log output.

    Fix bug 1159978.

    Change-Id: Id64a5b078b4024c3269086ed5d64940b3a38ddfa