Restart cinder-volume after creating a new volume type

When creating a volume type, we have to restart cinder-volume.

Closes-bug #461
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>

spec/classes/cloud_volume_storage_spec.rb

@@ -125,7 +125,8 @@ describe 'cloud::volume::storage' do
         should contain_cinder_config('premium/netapp_server_hostname').with_value('netapp-server.host')
         should contain_cinder__type('premium').with(
           :set_key   => 'volume_backend_name',
-          :set_value => 'premium'
+          :set_value => 'premium',
+          :notify    => 'Service[cinder-volume]'
         )
       end
     end