Comment 1 for bug 1992352

Reviewed: https://review.opendev.org/c/openstack/neutron/+/823637
Committed: https://opendev.org/openstack/neutron/commit/3e1e2d63b3383d28c9a36b00000ab89caffa3829
Submitter: "Zuul (22348)"
Branch: master

commit 3e1e2d63b3383d28c9a36b00000ab89caffa3829
Author: yatinkarel <email address hidden>
Date: Thu Jan 6 04:49:03 2022 +0000

    Enable rpc notifications only when rpc_workers >= 1

    rpc_workers can be set < 1 with 'ovn' backend when no
    other agent is running apart from ovn agents to
    consume these rpc notifications.

    Add and apply disable_notifications decorator on
    methods which do rpc cast calls to agents, the
    decorator makes the caller method execute only
    when rpc_workers >=1. This patch not changing
    default behavior and utilizes the rpc_workers config option
    to enable rpc notification on resources updates only when
    rpc_workers >= 1.

    Also set rpc_workers=0 in ovn jobs to cover this scenario.

    Closes-Bug: #1889737
    Closes-Bug: #1992352
    Change-Id: I700fe2cd422bc1eb8b5144ec116e7f0a60238419