Bug 10262 - fine calculation at checkin not respecting CircControl

Bug 10262 - fine calculation at checkin not respecting CircControl

The fines.pl script uses the system preference CircControl to decide
what branches circ rules to use for fine generation.

Recently, code was added to the returns system to recalculate the fine
at checkin time ( to support hourly loans ). The problem is that this
code does not respect CircControl.

Test Plan:
1) Set circ control to "the library you are logged in at"
2) Set different fines rules for two different librarys
3) Check an item out at library A, backdate the due date so it's overdue
   and will have fines.
4) Check the item in at library B
5) Observe that the fines should be generated based on library A's rules,
   but the fines will be based on library B's rules instead!
5) Apply the patch
6) Repeat steps 3 and 4.
7) Observe now that the fines should reflect the fines rules for Library A

Note: it seems counter-intuitive for the fines system to behave this way
based on the preference being set to "the library you are logged in at"
but it does make sense. The rules used are from "the library you are
logged in at" when the item is first checked out.

If the fines system really did use the rules for the library the item was
returned to, it would be easy to exploit the library system. Some Koha
using systems have branches that charge fines, and others that don't, so
a patron could just return any overdue items to a non-charging branch
to avoid ever paying fines!

Furthermore, it would mean that the fines.pl script would be using one
set of rules to charge fines, and the returns system could possibly be
using another. Since fines.pl has been around far longer, it makes sense
to assume the fines.pl behavior is canonical.

Signed-off-by: Mickey Coalwell <mcoalwell@nekls.org>
Signed-off-by: George Williams <georgew@latahlibrary.org>
Signed-off-by: Chris Cormack <chris@bigballofwax.co.nz>
Signed-off-by: Galen Charlton <gmc@esilibrary.com>
Merged with reservations; see comment on bug report for details.

(cherry picked from commit 040eb4016f4b01d44f87ab6aca515c6917f73479)
Signed-off-by: Tomas Cohen Arazi <tomascohen@gmail.com>