Bug 34066: Datatable options don't fully translate on list of saved reports

Bug 34066: Datatable options don't fully translate on list of saved reports

This patch corrects the DataTable option for defining an alternate
language string when no records are returned by a table filter. An
obsolete version of the option name was breaking the existing custom
option supplied by our datatables.js

To test, apply the patch and go to Reports -> Use saved..

 - In the DataTable of existing reports, all the DataTable controls
   should look correct.
 - In the filter field at the top of the table, enter a string which
   will not be found. You should see a message, "No matching reports
   found."
 - Install another language if necessary, and switch to that language.
 - The labels on all the DataTable controls should show the terms which
   have been translated for that language.

Signed-off-by: Caroline Cyr La Rose <caroline.cyr-la-rose@inlibro.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>