Bug 22826: Allow indexing of individual authorities in Elasticsearch

Bug 22826: Allow indexing of individual authorities in Elasticsearch

To test:
1 - perl misc/search_tools/rebuild_elastic_search.pl -h
2 - Note it indicates the bn option can be passed to index individual authids
3 - perl misc/search_tools/rebuild_elastic_search.pl -a -bn 92 -v
4 - Note the error
5 - Apply patch
6 - perl misc/search_tools/rebuild_elastic_search.pl -h
7 - Note new option ai|authid for indexing individual authids
8 - Note updated text for bn|biblionumber option
9 - perl misc/search_tools/rebuild_elastic_search.pl -a -bn 92 -v
10 - No errors, but no records indexed
11 - perl misc/search_tools/rebuild_elastic_search.pl -a -ai 92 -v
12 - 1 record indexed
13 - perl misc/search_tools/rebuild_elastic_search.pl -ai 92 -bn 92 -v
14 - 1 authority record and 1 biblio record indexed

Signed-off-by: Michal Denar <black23@gmail.com>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>