Bug 24147: Don't assume search_related will return ordered values

Bug 24147: Don't assume search_related will return ordered values

This test is failing randomly because it assume the order is always the
same. But it's not.

Note: Koha::Objects->search_related is never used , last use removed from
  commit 9aa724cdf29a57bc91e42b240b5bcd19e3814ada
  Bug 19599: Speed anonymise_issue_history up
We should keep it however IMO

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>