Comment 3 for bug 1570468

Reviewed: https://review.openstack.org/306035
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=726b2d4d67ada3df07f36ecfd81b0cf72881e159
Submitter: Jenkins
Branch: master

commit 726b2d4d67ada3df07f36ecfd81b0cf72881e159
Author: Kirill Bespalov <email address hidden>
Date: Tue Apr 19 13:29:02 2016 +0300

    Fix notification listeners usage

    Closes-Bug: #1570468

    Create the single notification pipeline listener and to aggregate
    targets and endpoints in it.

    In this implementation the incoming notification msg will be dispatched
    in a relevant endpoint by its own filter rule based on publisher id
    of a notifier, which sent this message.

    Each pipeline notifier has a conforming publisher id based on
    a pipeline name in which it to produce messages.

    Change-Id: If8c1c6838fd291ef8dbdd4d27c78fe5a36522178