postfix: file_line statt augeas, FIX

manifests/postfix.pp

@@ -12,6 +12,7 @@ class ubuntu_server::postfix($root_emails,$relayhost = "mailer.gwdg.de") {
     } ~> Service['postfix']
 
     file_line{'postfix_cfg_2':
+        ensure => absent,
         path => "/files/etc/postfix/main.cf",
         line => "default_transport = error",
         match => "(relay|default)_transport",