Comment 4 for bug 1794320

Reviewed: https://review.openstack.org/605113
Committed: https://git.openstack.org/cgit/openstack/openstack-ansible-os_blazar/commit/?id=6703cf06dd5a7d9ccefbbd5e6db2126cf47d8d21
Submitter: Zuul
Branch: master

commit 6703cf06dd5a7d9ccefbbd5e6db2126cf47d8d21
Author: ZhijunWei <email address hidden>
Date: Wed Sep 19 08:20:48 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: I2b4c4a119fa300fb5b64eaaf947e3c688bdb6e84
    Closes-Bug: #1794320