taskmanager unittests contains an unmocked entry

[Sushil Kumar]

https://github.com/openstack/trove/blob/master/trove/tests/unittests/taskmanager/test_models.py#L486 mocks taskmanager_models.CONF.get but does not unmocks it

This also goes un-noticed by the dangling mock detector.

Found it while writing other tests which involved trove.taskmanager.models.CONF

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/183084

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/183084
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=03c38b46ffa9ff1680271ebc5902da2e443f2264
Submitter: Jenkins
Branch: master

commit 03c38b46ffa9ff1680271ebc5902da2e443f2264
Author: Sushil Kumar <email address hidden>
Date: Thu May 14 15:33:26 2015 +0000

    Fixed the unmocked entry in taskmanager unit-tests

    Made use of patch.object to resolve the unmocking problem.

    Change-Id: I09a8f4bacaba2f409dc152f4f9b6dc1123f03131
    Closes-Bug: #1455125