Bug 17431: (follow-up) Fix issuingrules

Bug 17431: (follow-up) Fix issuingrules

Issuingrules could had prevented holds.t from passing with error tooManyReserves.
This patch sets issuingrules at the beginning of the test to make sure reserves
are allowed.

To test:
1. Apply patch & Run t/db_dependent/api/v1/holds.t
2. Observe test pass

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>