Bug 14528: Inconsistency in permissions check when listing shelves

Bug 14528: Inconsistency in permissions check when listing shelves

The svc script needed borrowers when the shelves.pl needed catalogue.
There is no sense to have different permissions here.

Test plan:
1/ Remove the borrowers permission to a user
2/ Use this user to log in
3/ Go on the shelf list
4/ Without this patch, you should get an endless "Processing..." which
is fixed if you apply it.

Signed-off-by: Nick Clemens <nick@quecheelibrary.org>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>