Add per module policy service refresh

Updating the policies for this project should only
refresh the services that reads it.

Change-Id: I5b7504bc02b2576a8921d1a70bc1bd07b19c1023
(cherry picked from commit fea62d44e9)
(cherry picked from commit 841e19d5a2)
(cherry picked from commit 28ee3ee9e7)

manifests/deps.pp

@@ -35,7 +35,7 @@ class gnocchi::deps {
 
   # policy config should occur in the config block also.
   Anchor['gnocchi::config::begin']
-  -> Openstacklib::Policy<||>
+  -> Openstacklib::Policy<| tag == 'gnocchi' |>
   ~> Anchor['gnocchi::config::end']
 
   # On any uwsgi config change, we must restart gnocchi-api.

manifests/policy.pp

@@ -75,6 +75,7 @@ class gnocchi::policy (
     file_group   => $::gnocchi::params::group,
     file_format  => 'yaml',
     purge_config => $purge_config,
+    tag          => 'gnocchi',
   }
 
   create_resources('openstacklib::policy', { $policy_path => $policy_parameters })

spec/classes/gnocchi_policy_spec.rb

@@ -32,6 +32,7 @@ describe 'gnocchi::policy' do
           :file_group   => 'gnocchi',
           :file_format  => 'yaml',
           :purge_config => false,
+          :tag          => 'gnocchi',
         )
         is_expected.to contain_oslo__policy('gnocchi_config').with(
           :enforce_scope        => false,
@@ -61,6 +62,7 @@ describe 'gnocchi::policy' do
           :file_group   => 'gnocchi',
           :file_format  => 'yaml',
           :purge_config => true,
+          :tag          => 'gnocchi',
         )
         is_expected.to contain_oslo__policy('gnocchi_config').with(
           :enforce_scope        => false,