Expose parameter to customize [oslo_messaging_notifications] retry

The parameter has been managed by puppet-oslo, but its value could not
be set via this module.

Change-Id: I4da1d7f1da63b761b91102007e566662c5707042

manifests/init.pp

@@ -177,6 +177,11 @@
 #   (list value)
 #   Default to $facts['os_service_default']
 #
+# [*notification_retry*]
+#   (Optional) The maximum number of attempts to re-sent a notification
+#   message, which failed to be delivered due to a recoverable error.
+#   Defaults to $facts['os_service_default'].
+#
 # [*notification_format*]
 #   (Optional) Define the notification format for identity service events.
 #   Valid values are 'basic' and 'cadf'.
@@ -413,6 +418,7 @@ class keystone(
   $notification_transport_url                     = $facts['os_service_default'],
   $notification_driver                            = $facts['os_service_default'],
   $notification_topics                            = $facts['os_service_default'],
+  $notification_retry                             = $facts['os_service_default'],
   $notification_format                            = $facts['os_service_default'],
   $notification_opt_out                           = $facts['os_service_default'],
   $control_exchange                               = $facts['os_service_default'],
@@ -545,6 +551,7 @@ class keystone(
     transport_url => $notification_transport_url,
     driver        => $notification_driver,
     topics        => $notification_topics,
+    retry         => $notification_retry,
   }
 
   oslo::messaging::rabbit { 'keystone_config':

releasenotes/notes/notification-retry-6343508320ebe279.yaml

@@ -0,0 +1,4 @@
+---
+features:
+  - |
+    The new ``keystone::notification_retry`` parameter has been added.

spec/classes/keystone_init_spec.rb

@@ -64,6 +64,7 @@ describe 'keystone' do
           :transport_url => '<SERVICE DEFAULT>',
           :driver        => '<SERVICE DEFAULT>',
           :topics        => '<SERVICE DEFAULT>',
+          :retry         => '<SERVICE DEFAULT>',
         )
 
         is_expected.to contain_oslo__messaging__rabbit('keystone_config').with(
@@ -300,6 +301,7 @@ describe 'keystone' do
           :notification_transport_url => 'rabbit://user:pass@host:1234/virt',
           :notification_driver        => ['keystone.openstack.common.notifier.rpc_notifier'],
           :notification_topics        => ['notifications'],
+          :notification_retry         => 10,
           :control_exchange           => 'keystone',
           :rpc_response_timeout       => 120,
           :executor_thread_pool_size  => 64,
@@ -318,6 +320,7 @@ describe 'keystone' do
           :transport_url => 'rabbit://user:pass@host:1234/virt',
           :driver        => ['keystone.openstack.common.notifier.rpc_notifier'],
           :topics        => ['notifications'],
+          :retry         => 10,
         )
       }
     end