This patch adds the manage_bookings subpermission check to the
biblios/{biblio_id}/checkouts endpoint and updates the corresponding
unit test too.
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>