pt_util: be admin

cheat and use the noauth flag so we pass the admin checks

Change-Id: Ie064db4fb930529fe474317d096238c915d1ef5b
Reviewed-on: http://gerrit.openafs.org/9839
Reviewed-by: Simon Wilkinson <simonxwilkinson@gmail.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>