Add per module policy service refresh

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

Change-Id: I5a30077b83dacc901bbad38ecf58095780a7233d

manifests/deps.pp

@@ -34,7 +34,7 @@ class mistral::deps {
 
   # policy config should occur in the config block
   Anchor['mistral::config::begin']
-  -> Openstacklib::Policy<||>
+  -> Openstacklib::Policy<| tag == 'mistral' |>
   ~> Anchor['mistral::config::end']
 
   # Installation or config changes will always restart services.

manifests/policy.pp

@@ -65,6 +65,7 @@ class mistral::policy (
     file_group   => $::mistral::params::group,
     file_format  => 'yaml',
     purge_config => $purge_config,
+    tag          => 'mistral',
   }
 
   create_resources('openstacklib::policy', { $policy_path => $policy_parameters })

spec/classes/mistral_policy_spec.rb

@@ -33,6 +33,7 @@ describe 'mistral::policy' do
           :file_group   => 'mistral',
           :file_format  => 'yaml',
           :purge_config => false,
+          :tag          => 'mistral',
         )
         is_expected.to contain_oslo__policy('mistral_config').with(
           :enforce_scope        => false,
@@ -63,6 +64,7 @@ describe 'mistral::policy' do
           :file_group   => 'mistral',
           :file_format  => 'yaml',
           :purge_config => true,
+          :tag          => 'mistral',
         )
         is_expected.to contain_oslo__policy('mistral_config').with(
           :enforce_scope        => false,