gplazma: Fix unit tests for vorolemap plugin

Target: trunk
Require-notes: no
Require-book: no
Request: 2.6
Acked-by: Karsten Schwank <karsten.schwank@desy.de>
Patch: http://rb.dcache.org/r/6202/
(cherry picked from commit 2992721bf542ebd6aca61bccc5f89b24f1284865)