Comment 4 for bug 1493430

Reviewed: https://review.openstack.org/221466
Committed: https://git.openstack.org/cgit/openstack/congress/commit/?id=abd15fa36a13f5b95180f678bf2c2966557e2bd8
Submitter: Jenkins
Branch: master

commit abd15fa36a13f5b95180f678bf2c2966557e2bd8
Author: Tim Hinrichs <email address hidden>
Date: Tue Sep 8 11:30:17 2015 -0700

    Ensure datasources are properly deleted

    Previously, deleting a datasource driver did not remove it from the DSE.
    That was caused by the polling thread having a reference to the object
    it was polling and therefore the object was not properly garbage
    collected upon deletion.

    This change deletes the polling thread and then deletes the object,
    which allows garbage collection to properly eliminate the datasource.

    Change-Id: I8063dab0786e7c728ba0c0c9b3cc33748f70a38c
    Closes-bug: 1493430