Bug 15244: t/db_dependent/Reserves.t depends on external data/configuration

Bug 15244: t/db_dependent/Reserves.t depends on external data/configuration

Test 14 in t/db_dependent/Reserves.t fails if syspref LocalHoldsPriority is
set to "[Give] priority for filling holds to patrons whose...

To verify:
- Set syspref as above and run test. Test 14 fails.
- Set syspref to [Don't give] and run test agein, it passes OK.

To test:
- Apply patch
- Run test again with syspref set / not set
Expected result: In both cases test should pass

(AMended to change bug title)

Signed-off-by: Galen Charlton <gmcharlt@gmail.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
(cherry picked from commit ae5962cab435fe5119cf743a2ea0b9e501985ff9)
Signed-off-by: Julian Maurice <julian.maurice@biblibre.com>