Bug 28670: Prevent api/v1/patrons_holds.t to fail randomly

Bug 28670: Prevent api/v1/patrons_holds.t to fail randomly

12:01:12 koha_1       |     #   Failed test 'Holds retrieved'
12:01:12 koha_1       |     #   at t/db_dependent/api/v1/patrons_holds.t line 56.
12:01:12 koha_1       |     #     Structures begin differing at:
12:01:12 koha_1       |     #          $got->[0]{hold_id} = '256'
12:01:12 koha_1       |     #     $expected->[0]{hold_id} = '255'
12:01:12 koha_1       |     # Looks like you failed 1 test of 9.
12:01:12 koha_1       |
12:01:12 koha_1       | #   Failed test 'list() tests'
12:01:12 koha_1       | #   at t/db_dependent/api/v1/patrons_holds.t line 70.

This is a weird one, and the only solution I see it to force the order
we want to receive the holds.

I guess we should not rely on an order if no order by clause is passed

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>