Switch to puppet-oslo configuring policy

Change-Id: Id6a805508153f03b83967783caf22db72afc8e79

manifests/policy.pp

@@ -38,5 +38,6 @@ class designate::policy (
   }
 
   create_resources('openstacklib::policy::base', $policies)
+  oslo::policy { 'designate_config': policy_file => $policy_path }
 
 }

spec/classes/designate_policy_spec.rb

@@ -20,6 +20,7 @@ describe 'designate::policy' do
         :key   => 'context_is_admin',
         :value => 'foo:bar'
       })
+      is_expected.to contain_designate_config('oslo_policy/policy_file').with_value('/etc/designate/policy.json')
     end
   end