Enable policy settings in designate-api

This change makes designate::policy included by the api class
automatically to enable oslo.policy settings automatically in
the designate service.

Closes-Bug: #1980698
Change-Id: Ided1306c3c7154861c7c55257ea2bdd35fa6b370
(cherry picked from commit 7ff495ca7d)
(cherry picked from commit 2d8e5950f2)
(cherry picked from commit 5b83ac5e49)

manifests/api.pp

@@ -135,6 +135,7 @@ class designate::api (
 ) inherits designate {
 
   include designate::deps
+  include designate::policy
 
   if $enabled_extensions_v1 != undef {
     warning('The enabled_extensions_v1 parameter has been deprecated and has \

spec/classes/designate_api_spec.rb

@@ -17,6 +17,11 @@ describe 'designate::api' do
 
   shared_examples 'designate-api' do
     context 'with default parameters' do
+      it 'includes the dependent classes' do
+        is_expected.to contain_class('designate::deps')
+        is_expected.to contain_class('designate::policy')
+      end
+
       it 'installs designate-api package and service' do
         is_expected.to contain_service('designate-api').with(
           :name      => platform_params[:api_service_name],