Bug 14038: Make nl-search.pl not using C4::Members::Search

Bug 14038: Make nl-search.pl not using C4::Members::Search

To get rid of SQLHelper, we should not use this C4::Members::Search anymore.

Test plan for Magnus :)
0/ Enable the pref you need to use the Norwegian national library card ft
1/ Go on the members/nl-search.pl page and search for patrons.
2/ Make sure you search by card number and by "social security number"

Signed-off-by: Magnus Enger <magnus@enger.priv.no>
Searching works the same with and without the patch. Thanks Jonathan!

Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>