Bug 18572 - Improper branchcode set during OPAC renewal

Bug 18572 - Improper branchcode set during OPAC renewal

To test:
1 - Set 'OpacRenewalBranch' to various settings
2 - Renew an item for a ptron under each setting
3 - Confirm action_log entries reflect the correct branch for each
secnario
4 - prove t/db_dependent/Circulation/issue.t

Signed-off-by: David Kuhn <techservspec@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>