Continued the shifting of the consistency tests code to the new relax design started at r4583.
This commit makes some changes pointed out by Edward d'Auvergne in a post at:
https://mail.gna.org/public/relax-devel/2008-01/msg00041.html (Message-id:
<7f080ed10801111043g7954a49fic72f433110d4cfbc@...>)
