Bug 18411: Fix failing search_utf8.t tests

Bug 18411: Fix failing search_utf8.t tests

TEST PLAN
---------
export KOHA_INTRANET_URL=...
prove -v t/db_dependent/www/search_utf8.t

something like seen before failure:
t/db_dependent/www/search_utf8.t .. 9/66 Error GETing http://koha_16_11:8080/cgi-bin/koha/tools/background-job-progress.pl?jobID=741d649f9d4472fe75f30761ba2488c0: Bad Request at t/db_dependent/www/search_utf8.t line 170.

apply this patch
prove -v t/db_dependent/www/search_utf8.t

Now it is the marc staging that is failing.
And that is failing in master for me.
So, I don't think it is the test that is a problem at this point,
but the actual staged marc records process.

Signed-off-by: Lee Jamison <ldjamison@marywood.edu>
I'm not sure why you had problems. All 66 tests passed
after patch application and the patch also passes QA Tools.
I tested this patch on a brand new kohadevbox without issue.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit bd14d2db9c6f6ac34a1dc0ea4ab741c05c22e5d3)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>