Bug 17397: Show name of librarian who created circulation message

Bug 17397: Show name of librarian who created circulation message

Test plan:
1) Apply the patch
2) Update DB structure
3) Run update_dbix_class_files.pl
4) Select patron for checking out
5) Try to add some circulation and opac messages
6) Note that now there is creator (you ;) ) shown by every message added (with link to creator profile)
7) Try to delete messages to confirm that everything works as expected

Signed-off-by: Sonia Bouis <koha@univ-lyon3.fr>
Signed-off-by: Jonathan Druart <jonathan.druart@biblibre.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>