Bug 37392: Adjust routines

Bug 37392: Adjust routines

The current code only handled a single layer of groups - top level setting the features, and libraries directly
underneath.

The code, however, was not correctly checking the features, and was limiting to single like when no restrictions found.

This patch gets the root ancestor for a group, checks the desired feature against than group, then fetches all children
of the current group and makes them allowed - i.e. when a library is in a group, all siblings and descendants in that group
or subgroups can be accessed

I adjust some typos in the tests too, this needs more cleanup in the future, but am submitting for any discussion

Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Brendan Lawlor <blawlor@clamsnet.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>