include policy class in api.pp

Like we do in other modules, include zaqar::policy class in
zaqar::server so users can define policies without taking care of the
class.

Change-Id: I9f549f11bd4e939ad41ff77c51dd2f32338621c8

manifests/server.pp

@@ -29,6 +29,7 @@ class zaqar::server(
   include ::zaqar
   include ::zaqar::deps
   include ::zaqar::params
+  include ::zaqar::policy
 
   if $enabled {
     if $manage_service {

spec/classes/zaqar_server_spec.rb

@@ -14,6 +14,7 @@ describe 'zaqar::server' do
           :ensure => 'running',
           :enable => true
       )}
+      it { is_expected.to contain_class('zaqar::policy') }
 
     end
   end