Add per module policy service refresh

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

Change-Id: I94e1120013aa6e15bbf3aa48a9c29d9943985440

manifests/deps.pp

@@ -38,7 +38,7 @@ class horizon::deps {
 
   # policy config should occur in the config block
   Anchor['horizon::config::begin']
-  -> Openstacklib::Policy<||>
+  -> Openstacklib::Policy<| tag == 'horizon' |>
   ~> Anchor['horizon::config::end']
 
   # Installation or config changes will always restart services.

manifests/policy/base.pp

@@ -52,6 +52,7 @@ define horizon::policy::base(
     file_group   => $::horizon::params::wsgi_group,
     file_mode    => $file_mode,
     file_format  => $file_format,
-    purge_config => $purge_config
+    purge_config => $purge_config,
+    tag          => 'horizon',
   }
 }

spec/defines/horizon_policy_base_spec.rb

@@ -25,6 +25,7 @@ eos
           :file_group   => platform_params[:wsgi_group],
           :file_mode    => '0640',
           :purge_config => false,
+          :tag          => 'horizon',
         )
       end
     end
@@ -53,6 +54,7 @@ eos
           :file_group   => platform_params[:wsgi_group],
           :file_mode    => '0644',
           :purge_config => true,
+          :tag          => 'horizon',
         )
       end
     end