Bug 12509 - Fix Untranslatable Restriction added by overdues process

Bug 12509 - Fix Untranslatable Restriction added by overdues process

Changes the value of the "comment" column in "borrower_debarments" table
from "Restriction added by overdues process yyyy-mm-dd hh:mm:ss" to
"OVERDUE_PROCESS yyyy-mm-dd hh:mm:ss" in the overdue_notices.pl. Then in
the templates "moremember.tt", "circulation.tt", "memberentrygen.tt",
"opac-reserve.tt" and "opac-user.tt" the value of "comment" is
check, if it's an automatical comment due to overdue process it'll
write "Restriction added by overdues process yyyy-mm-dd hh:mm:ss",
then if there is a customizable comment it will be written without
modification. Like this, the comment "Restriction added by overdues
process" is written in the po files and can be translated later.

To test:
1) create a patron with automatical restriction due to overdue process;
2) apply patch;
3) run misc/cronjobs/overdue_notices.pl;
4) verify if the comment "Restriction added by overdues process" is well
   written and translatable on the following page :
    - opac patron home page (opac-user.tt);
    - opac item reservation page (opac-reserve.tt);
    - pro patron page (moremember.tt);
    - reservation item for a patron (circulation.tt, memberentrygen.tt);
5) try to translate the comment in po files;
6) sign off.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>