Bug 18344: Allow overdue fines cap at replacement price, and cap by amount to work...

Bug 18344: Allow overdue fines cap at replacement price, and cap by amount to work together

There is no reason that a library shouldn't be able to use the monetary
fines cap and the replacement price cap at the same time. The code is
written in such a way that they already work harmoniously. We have
librarians who wish to use both so they can set a high cap of $10.00 but
also use the replacement price cap so that a $20.00 book would only get
a fine of $10.00, but a $5.00 paperback will only get a fine of $5.00

Test Plan:
1) Apply this patch
2) Create a rule with a fines cap of $10, *and* a cap at replacement price, and a daily fine of $1
3) Create two items, one with a replacement price of $5 and one with a
   replacement price of $15
4) Check out these items to a patron, backdate the checkouts so they are
   already overdue by a couple months
5) Check the items in ( make sure calc fine at checkin is enabled for
    you )
6) Note the one item has a fine of $5 and the other has a fine of $10!

Signed-off-by: David Kuhn <techservspec@gmail.com>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
(cherry picked from commit e702ff89f77e50b1bcef1cdc1548627957251df0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>