Bug 10808: (follow-up) reformat auth_finder.pl

Bug 10808: (follow-up) reformat auth_finder.pl

Perltidy and some format changes.

Most important : call to get_template_and_user must be at begining
of script because it checks authentification.

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Testing notes:
- Tested various searches, selections now remain after
  submitting the search form.
Regression testing:
- Clearing the authority from the record still works.
- Creating a new authority from the plugin page
  still works.
- Autocomplete of entries still works.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>
(cherry picked from commit ca29e0658c469abff1e54e8630fb989757d02f71)
Signed-off-by: Fridolin SOMERS <fridolin.somers@biblibre.com>