Bug 8252: (follow-up) fix biblio-zebra-indexdefs.xsl

Bug 8252: (follow-up) fix biblio-zebra-indexdefs.xsl

This patch fixes biblio-zebra-indexdefs.xsl files.
It was generated from biblio-koha-indexdefs.xsm with the new
koha-indexdefs-to-zebra.xsl amended by F. Démians's patch.

To test :
- Take a DOM UNIMARC Koha
- Apply all the patchs of 8252 bug, including this one
- Copy src/etc/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl
  to your etc/zebradb/marc_defs/unimarc/biblios/ located in your
  installation directory
- Run rebuid_zebra -b -x -r -v
- make advanced searches on staff interface and opac, on coded fields
  indexes (Audience, Literary genre, Biography, Illustration, Content,
  Video Types, Serial Type, Periodicity, Regularity, Picture)

Signed-off-by: Frédéric Demians <f.demians@tamil.fr>
Ok for me. This patch put in sync indexes XSL definition with
authoritative XML definition. Subsequently, it won't be difficult to
amend DOM UNIMARC indexes defintion if necessary. And, as it is, I don't
see any regression, whereas I can see huge improvements. Thanks Mathieu!

Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>