Comment 3 for bug 1794320

Reviewed: https://review.openstack.org/605112
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-os_magnum/commit/?id=9508e525eda4eb883bdde1efce1c517f4f1d3f5d
Submitter: Zuul
Branch: master

commit 9508e525eda4eb883bdde1efce1c517f4f1d3f5d
Author: ZhijunWei <email address hidden>
Date: Wed Sep 19 08:20:41 2018 -0400

    Update messaging notification configuration

    This patch add the conditional inclusion of the notification
    section of the service configuration. This ensures that oslo.messaging
    notifications use the correct transport for deployments that have
    separate rpc and notify messaging backends. For example, if the
    transport_url is not provided in the notification section of the
    service configuration, the transport_url specified in the default
    section will be used instead.

    This patch conditionally selects the notifier driver. The noop
    driver will be selected when notification publishing is disabled.
    The messagingv2 driver is selected when notification publishing is
    enabled.

    Change-Id: Iaadc0d852c003e653e00b4736ddc28f16ddfec5a
    Closes-Bug: #1794320