Comment 8 for bug 1931639

Reviewed: https://review.opendev.org/c/openstack/ovn-octavia-provider/+/796839
Committed: https://opendev.org/openstack/ovn-octavia-provider/commit/9c362b3ded873121e9626e5322245a33fd429840
Submitter: "Zuul (22348)"
Branch: stable/wallaby

commit 9c362b3ded873121e9626e5322245a33fd429840
Author: Flavio Fernandes <email address hidden>
Date: Sat Jun 12 08:09:33 2021 -0400

    Ensure that load balancer is added to logical switch

    Add logic to handle cases where a race between logical router port and
    load balancer creation renders the affected logical switch without the
    proper load balancer in its attribute.

    This change adds _get_subnet() to the helper module, so obtaining the
    subnet is done from a shared location.

    Closes-bug: #1931639
    Change-Id: Ie4a843fc5dd98fc25f8cecf91997e275c36f121d
    (cherry picked from commit b2a862fdb3d4eae440a342f6b6bbc0323022f8ba)