Bug 15069: Update items_search_fields.authorised_values_category to varchar(32)
This is a follow-up for bug 13379.
items_search_fields.authorised_values_category is now a varchar(32) but
the updatedatabase.pl did not modify it (changed only on
kohastructure.sql)
Test plan:
SHOW CREATE TABLE items_search_fields
before and after this patch.
items_search_fields.authorised_values_category should be a varchar(32)
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>