Bug 30447: Unit tests

Bug 30447: Unit tests

Added tests to ensure that Koha::Holds->get_items_that_can_fill returns items with datecancelled and datearrived
Added test for correct number of items for each call of "get_items_that_fill"

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit b4a9edc83f72b9740cd59bd5c842855cd65e19cc)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 2dfd3b05e74d5a7641bf93b021b437427fb8d86b)
Signed-off-by: Arthur Suzuki <arthur.suzuki@biblibre.com>