Bug 17967: TT syntax for notices - Prove that ODUE is compatible

Bug 17967: TT syntax for notices - Prove that ODUE is compatible

Nothing new here, unless we are introducing a regression.
The items.fine is a trick of our historical syntax.
We need to provide a way to access this value from the a notice template
using the TT syntax.
A bug 17976 has been opened for discussion.

Test plan:
Define ODUE and OVERDUES_SLIP notice templates and use it to generate
overdue notices from the cronjob script (misc/cronjobs/overdue_notices.pl)
or the interface (members/print_overdues.pl).

You should be able to generate the same notices with and without using
the TT syntax

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>