Bug 10037: fix item index in UNIMARC DOM indexing

Bug 10037: fix item index in UNIMARC DOM indexing

In UNIMARC DOM indexing, "item" index was working only for subfields
of 995 field mapped with specific indexes, and also in index (ex :
$a, $b...). It was not working for the other subfields (ex : $g),
because a comment from record.abs was integrated in DOM config files.

This patch removes the comment.

To test, in a DOM UNIMARC environment :
1) In a item, write some value "Test10037" in 995$g
2) Search for this value in simple search, this way : item=Test10037
   => you should have no results
3) Apply the patch. if necessary, copy the modified
   etc/zebradb/marc_defs/unimarc/biblios/biblio-koha-indexdefs.xml and
   etc/zebradb/marc_defs/unimarc/biblios/biblio-zebra-indexdefs.xsl into
   the /etc/... directory in your main Koha directory
4) Reindex Zebra biblios
5) Do the same search as 2) => you should have one result

Signed-off-by: Bernardo Gonzalez Kriegel <bgkriegel@gmail.com>
Work as described. No koha-qa errors.

Test

NOTE: default UNIMARC framework don't have 995g,
so I must add it first.

1) Added test string to 995b on some record
2) Reindex and search as indicated, no results
3) cp files to destination
4) reindex
5) search and result ok !

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