Bug 11205: fix DataTables filter issue when more than one table is on a page

Bug 11205: fix DataTables filter issue when more than one table is on a page

This patch fixes a bug where if there are more than one table on the
same page that uses the DataTables column filter, applying a filter on
one table applied it to both.

Test plan:
1/ Go on serials/serials-search.pl?searched=1
2/ Filter on a column (e.g., title) on the open subscriptions
   table.
3/ Switch to the closed subscriptions table.  Observe that
   that the table is *also* filtered by the criteria
   set for the open subscriptions table.
4/ Apply the patch and reload the page.
5/ This time, applying a filter on one time should not affect
   the other table.

Signed-off-by: Brendan Gallagher <brendan@bywatersolutions.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>