Bug 15579: Fix permission for batch record modification

Bug 15579: Fix permission for batch record modification

To test:

- For a patron, permissions 'catalogue' and 'records_batchmod' only
- Log in as this patron
- Go to /cgi-bin/koha/tools/batch_record_modification.pl

Without patch: You have no permisson to acces the page.
With patch: Page 'Batch record modification' displays as expected.

(Amended to fix wrong test plan)

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Brendan Gallagher brendan@bywatersolutions.com