Add notification_topics option

Add notification_topics to configure AMQP topic used for OpenStack
notifications.

Change-Id: I2f319176f51190367bebe1e827b769a39819cc78

manifests/ceilometer.pp

@@ -19,9 +19,14 @@
 #   'cinder.openstack.common.notifier.rabbit_notifier' was used. oslo.messaging
 #   was adopted in icehouse/juno. See LP#1425713.
 #
+# [*notification_topics*]
+#   (optional) AMQP topic used for OpenStack notifications
+#   Defaults to $::os_service_default
+#
 class cinder::ceilometer (
   $notification_transport_url = $::os_service_default,
   $notification_driver        = 'messagingv2',
+  $notification_topics        = $::os_service_default,
 ) {
 
   include ::cinder::deps
@@ -29,5 +34,6 @@ class cinder::ceilometer (
   oslo::messaging::notifications { 'cinder_config':
     transport_url => $notification_transport_url,
     driver        => $notification_driver,
+    topics        => $notification_topics,
   }
 }

releasenotes/notes/add_messaging_notification_parameters-871a2345ef981235.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - Add new parameter "notification_topics", AMQP topic used
+    for OpenStack notifications.

spec/classes/cinder_ceilometer_spec.rb

@@ -12,6 +12,8 @@ describe 'cinder::ceilometer' do
         :value => '<SERVICE DEFAULT>')
       is_expected.to contain_cinder_config('oslo_messaging_notifications/driver').with(
         :value => 'messagingv2')
+      is_expected.to contain_cinder_config('oslo_messaging_notifications/topics').with(
+        :value => '<SERVICE DEFAULT>')
     end
   end
 end