dbsync: don't require User resource

User[zaqar] is not in the catalog, don't try to require it, it doesn't
exit!

The dbsync is run after package management so we're good.

Change-Id: Ie642f9ec6e6acc0765bc88ec4438a01a5618563b

manifests/db/sync.pp

@@ -7,7 +7,6 @@ class zaqar::db::sync {
     user        => 'zaqar',
     refreshonly => true,
     subscribe   => [Package['zaqar'], Zaqar_config['database/connection']],
-    require     => User['zaqar'],
   }
 
   Exec['zaqar-manage db_sync'] ~> Service<| title == 'zaqar' |>