Enable policy settings in placement-api

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

Closes-Bug: #1935761
Change-Id: I75f518c9f9a23237e59c2452462d261517df5e64

manifests/api.pp

@@ -49,6 +49,7 @@ class placement::api (
 ) inherits placement::params {
 
   include placement::deps
+  include placement::policy
 
   if $manage_service {
     if $api_service_name == 'httpd' {

spec/classes/placement_api_spec.rb

@@ -9,6 +9,7 @@ describe 'placement::api' do
       end
 
       it { should contain_class('placement::deps') }
+      it { should contain_class('placement::policy') }
       it { should contain_placement__generic_service('api').with(
         :service_name   => platform_params[:service_name],
         :package_name   => platform_params[:package_name],