Comment 6 for bug 1430308

Reviewed: https://review.openstack.org/206169
Committed: https://git.openstack.org/cgit/openstack/networking-cisco/commit/?id=ac84fcb861bd594a5a3773c32e06b3e58a729308
Submitter: Jenkins
Branch: stable/kilo

commit ac84fcb861bd594a5a3773c32e06b3e58a729308
Author: Carol Bouchard <email address hidden>
Date: Thu Jul 23 12:34:26 2015 -0400

    Delete fails after switch reset (replay off)

    Many changes have occurred since this bug was written. We now have
    a newer N9K image and dhcp port entries are now created when the CLI
    'neutron subnet-create' is executed. I went thru the steps as
    defined by the bug. The first failure after switch restart is due
    to the ncclient session being stale (fixed by 1399998). This is
    expected when replay is not enabled. When attempting delete on
    2nd retry when ncclient session new, the N9K switch returns the error
    message 'None of the VLANs exist'. This changeset accepts this
    message as an acceptable condition and prevents exceptions from
    bubbling up to higher layer.

    Change-Id: I072dc05590d8c7d376c491c931d18befa507af30
    Closes-bug: #1430308
    (cherry picked from commit 6d2be75e00fca5b844562dba9c1f10a1c038a0a9)