Fix map calling in hash

map defines the default path by prepending '/etc/postfix/' to $name, so
this doesn't work when the name is already the absolute path. We need
to force the path passed to map.

manifests/hash.pp

@@ -52,6 +52,7 @@ define postfix::hash (
     source  => $source,
     content => $content,
     type    => 'hash',
+    path    => $name,
   }
 
   Class['postfix'] -> Postfix::Hash[$title]