Comment 4 for bug 1680136

Reviewed: https://review.openstack.org/453740
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=ed12ceaef185f8ba9560ac22382588fd04de2f62
Submitter: Jenkins
Branch: stable/ocata

commit ed12ceaef185f8ba9560ac22382588fd04de2f62
Author: Kevin Benton <email address hidden>
Date: Wed Apr 5 09:19:16 2017 -0700

    Add work-around for older oslo.db

    The min version of oslo.db in Newton at the time of this
    commit is 4.10 and Ocata is 4.15, which do not include
    a commit [1] to skip None values in pagination.
    Rather than trying to get oslo.db globally bumped to
    4.17.0 on both stable branches, this just skips None
    in our code.

    This is not proposed to master because it uses a new enough
    oslo.db to not be impacted by this.

    1. b3869d04cff7071c1226758eb8b58fde9eba5b8d

    Closes-Bug: #1680136
    Change-Id: Ieef10eebd93f99404dd2fd87ccbab9b75632945a