Bug 26260: Add missing elastic>cnx_pool to koha-conf-site.xml.in

Bug 26260: Add missing elastic>cnx_pool to koha-conf-site.xml.in

Added by bug 22705, but only in etc/koha-conf.xml

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit 33ab3c690076bf78d62105502b6de54e45e766b2)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit bbfa9c3a9a9ae59eae50a3d97287772389edf6ce)

Signed-off-by: Aleisha Amohia <aleishaamohia@hotmail.com>