Bug 17989: Final changes

Bug 17989: Final changes

[1] The template sco/printslip.tt is in the regular modules directory.
Should not be prefixed with a slash.

Test plan:
[1] Try to find another occurrence just like the one corrected in
    sco/printslip.pl where an absolute path is passed to gettemplate or
    get_template_and_user. I already tried several regex variations
    while git grepping template_name, but you may still find one..

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Josef Moravec <josef.moravec@gmail.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Amended: Removed the changes for svc/members/search. Not needed.
Commit message adjusted accordingly.

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>