Deprecate aodh::gnocchi_url as it has no effect

Usage of the gnocchi_url configuration option was removed from aodh in
I41ef467750a403841ad96bfa7607ad63bd55702d.

Change-Id: I49f9c44adb3d0dfabfbb701d41c99a8267bed5cf

manifests/init.pp

@@ -224,15 +224,17 @@
 #   (optional) If set, use this value for max_overflow with sqlalchemy.
 #   Defaults to: undef.
 #
-# [*gnocchi_url*]
-#   (optional) URL to Gnocchi.
-#   Defaults to: $::os_service_default.
-#
 # [*purge_config*]
 #   (optional) Whether to set only the specified config options
 #   in the aodh config.
 #   Defaults to false.
 #
+# DEPRECATED PARAMETERS
+#
+# [*gnocchi_url*]
+#   (optional) URL to Gnocchi.
+#   Defaults to undef.
+#
 class aodh (
   $package_ensure                     = 'present',
   $alarm_history_time_to_live         = $::os_service_default,
@@ -283,14 +285,19 @@ class aodh (
   $database_max_retries               = undef,
   $database_retry_interval            = undef,
   $database_max_overflow              = undef,
-  $gnocchi_url                        = $::os_service_default,
   $purge_config                       = false,
+  # DEPRECATED PARAMETERS
+  $gnocchi_url                        = $undef,
 ) inherits aodh::params {
 
   include ::aodh::deps
   include ::aodh::db
   include ::aodh::logging
 
+  if $gnocchi_url {
+    warning('gnocchi_url has no effect as of Newton and will be removed in a future release')
+  }
+
   package { 'aodh':
     ensure => $package_ensure,
     name   => $::aodh::params::common_package_name,
@@ -348,7 +355,6 @@ class aodh (
   }
 
   aodh_config {
-    'DEFAULT/gnocchi_url':                 value => $gnocchi_url;
     'database/alarm_history_time_to_live': value => $alarm_history_time_to_live;
   }
 }

releasenotes/notes/deprecate-gnocchi_url-parameter-415f98e9712ed768.yaml

@@ -0,0 +1,5 @@
+---
+deprecations:
+  - aodh::gnocchi_url is deprecated and will be removed in a future
+    release. The correct URL is automatically retrieved from the indentity
+    service's service catalog.

spec/classes/aodh_init_spec.rb

@@ -55,7 +55,6 @@ describe 'aodh' do
           :rabbit_heartbeat_rate              => '10',
           :kombu_compression                  => 'gzip',
           :package_ensure                     => '2012.1.1-15.el6',
-          :gnocchi_url                        => 'http://127.0.0.1:8041',
           :notification_transport_url         => 'rabbit://rabbit_user:password@localhost:5673',
           :notification_driver                => 'ceilometer.compute.aodh_notifier',
           :notification_topics                => 'openstack',
@@ -75,7 +74,6 @@ describe 'aodh' do
         is_expected.to contain_aodh_config('oslo_messaging_notifications/transport_url').with_value('rabbit://rabbit_user:password@localhost:5673')
         is_expected.to contain_aodh_config('oslo_messaging_notifications/driver').with_value('ceilometer.compute.aodh_notifier')
         is_expected.to contain_aodh_config('oslo_messaging_notifications/topics').with_value('openstack')
-        is_expected.to contain_aodh_config('DEFAULT/gnocchi_url').with_value('http://127.0.0.1:8041')
       end
 
       context 'with multiple notification_driver' do