Bug 16160: Fix t/../www/search_utf8.t for layout change

 Bug 16160: Fix t/../www/search_utf8.t for layout change

Some of the include files in tools/manage-marc-import.tt introduced a new form object
so the form index for the tests needed to be changed to match the new layout.

While testing this I also found that due to the new record_type input in stage-marc-import.tt
the tests would fail if run on an instance with already imported stuff (i.e. the import id
was defaulting to zero). This might have been the cause of some random failures in jenkins
befire we started to DROP / re-CREATE the DB.

To test:
- Run (on kohadevbox:ansible)
  $ sudo koha-shell kohadev
  $ cd kohaclone
  $ prove t/db_dependent/www/search_utf8.t
=> FAIL: mainsubmitform is not found, and the tests hang
- Apply the patch
- re-run the tests:
 $ prove t/db_dependent/www/search_utf8.t
=> SUCCESS: Tests now pass!
- Sign off

Regards

Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Brendan A Gallagher <brendan@bywatersolutions.com>