Bug 27153: Add filter option to Elasticsearch indexing

Bug 27153: Add filter option to Elasticsearch indexing

This patch uses the filter option from the mappings to add a value_callback
to reord processing for indexing.

Fields defined with 'punctuation' filter will have all punctuation stripped when
conveted to documents.

Tests are updated.

Signed-off-by: Danielle M Elder <danielle.elder@law.utexas.edu>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>