Fix ordering of rsyslog install

My previous attempt (I363ed7927954ecba9f83c38604b5dba2b4ce3045) added
the rsyslog package, but did not ensure it was installed before the
config update.

This adds the package as a requirement of the service class, which
should do it.

Change-Id: I910ba1fcce141fccf3fd3e472904274e6c03fb0a

modules/openstack_project/manifests/template.pp

@@ -113,6 +113,7 @@ class openstack_project::template (
       ensure     => running,
       enable     => true,
       hasrestart => true,
+      require    => Package['rsyslog'],
     }
     $rsyslog_notify = [ Service['rsyslog'] ]
   }