Bug 15151: Avoid DB access to load C4::Members

Bug 15151: Avoid DB access to load C4::Members

In order to avoid loading Koha::NorwegianPatronDB a DB query was
used. Instead, a require should be used. This causes non-db_dependent
tests that load C4::Members to fail.

To test:
- Shut mysql down
  $ sudo service mysql stop
- Run the tests:
  prove t/Circulation_barcodedecode.t
=> FAIL: DB connection is expected, tests fail
- Apply the patch
- Run the tests:
  prove t/Circulation_barcodedecode.t
=> SUCCESS: Tests pass
- Sign off .-D

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>