Excessive logging due to defaults being unset in tests

[Morgan Fainberg]

Keystone logs from tests tend to be excessively large due to the default log levels not being set.
This can occasionally cause logs to exceed the 50MB limit (infra) on a gate/check job.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/106496

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/106496
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=d4aa4c895f52ff4e99ff785bd31da34ada038e7c
Submitter: Jenkins
Branch: master

commit d4aa4c895f52ff4e99ff785bd31da34ada038e7c
Author: Morgan Fainberg <email address hidden>
Date: Fri Jul 11 16:03:17 2014 -0500

    Make sure unit tests set the correct log levels

    Unit tests appear to not set the expected logging levels so
    a number of modules will log excessivly (e.g. ISO8601).

    This change ensures the base test classe sets the correct logging
    levels (in the same way as the openstack.common.log module).

    Change-Id: Ic11b7adee5f27f71094b4ef2b4a635f78f83cba8
    Closes-Bug: #1340970