Bug 17989: (QA follow-up) Replace bad dots in SuggestionEngine_ExplodedTerms.t

Bug 17989: (QA follow-up) Replace bad dots in SuggestionEngine_ExplodedTerms.t

SuggestionEngine_ExplodedTerms.t uses paths like /../.. or /.. in order
to find a template in opac-tmpl.
Sub badtemplatecheck does not like these paths.
Using Cwd::abs_path to resolve the situation (rel2abs does not).

Test plan:
Run again t/db_dependent/SuggestionEngine_ExplodedTerms.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>