remove conflicting notify dep from resource

The db sync resource had a notify set that was leading to
a conflict with the arrow syntax.

manifests/registry.pp

@@ -81,6 +81,8 @@ class glance::registry(
 
   if $enabled {
 
+    Exec['glance-manage db_sync'] ~> Service['glance-registry']
+
     exec { 'glance-manage db_sync':
       command     => $::glance::params::db_sync_command,
       path        => '/usr/bin',
@@ -88,7 +90,6 @@ class glance::registry(
       refreshonly => true,
       logoutput   => on_failure,
       subscribe   => [Package['glance'], File['/etc/glance/glance-registry.conf']],
-      notify      => Service['glance-registry'],
     }
     $service_ensure = 'running'
   } else {