Bug 15751: Add ModDateLastSeen to ProcessOfflineReturn

Bug 15751: Add ModDateLastSeen to ProcessOfflineReturn

Test plan:
1) Before the patch when one checks in something using the KOCT the last seen
date is not updated.
2) After the patch when one checks in something using the KOCT the last seen
   date is updated.

Signed-off-by: Laurence Rault <laurence.rault@biblibre.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Joy Nelson <joy@bywatersolutions.com>
(cherry picked from commit 47414f97c1358da9cd79e1e884ab1f9d74516014)

Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>