Comment 4 for bug 1809238

Reviewed: https://review.openstack.org/626538
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=76c28812013c558041612609efe30b88a5226267
Submitter: Zuul
Branch: master

commit 76c28812013c558041612609efe30b88a5226267
Author: LIU Yulong <email address hidden>
Date: Mon Dec 17 10:35:33 2018 +0800

    Make test service_plugins override simple

    Just make things simple and give a chance to accept that
    ordered 'service_plugins' list or tuple for the base test
    class NeutronDbPluginV2TestCase.

    Change-Id: I7c352ede811703e3a96848378b92cbbf5e109228
    Related-Bug: #1809238