Comment 9 for bug 1495430

Reviewed: https://review.openstack.org/426209
Committed: https://git.openstack.org/cgit/openstack/neutron-lbaas/commit/?id=16a323dbf740d80bfb8f816025719e6bbf69d4e7
Submitter: Jenkins
Branch: stable/newton

commit 16a323dbf740d80bfb8f816025719e6bbf69d4e7
Author: Zhou Zhihong <email address hidden>
Date: Thu Jul 21 03:59:28 2016 -0700

    The lb namespace can not be deleted

    When delete the last listener, the lb instance was undeployed.
    But the lb namespace was not deleted at this time. After that,
    when delete the loadbalancer, the lb namespace will not be
    deleted for the exists() check always return False.

    Closes-Bug: #1495430
    (cherry picked from commit 9073940a82d3adf6581643941c059bf1d8bb8615)
    Change-Id: Ic3cb25a6bd2bf86f8c30ef62ae323c3bab0c82fc