Bug 33028: Fix calculations around cronjob fines.pl

Bug 33028: Fix calculations around cronjob fines.pl

When currency format is set on FR commas are decimals separators
but when cron like fines.pl try to calculate fines it's fails due to
this format.

I changed this behavior by targetted 'fine' and 'overduefinescap' in
circulation_rules.rule_name to unformat them when we save them.

This also fix the display in smart_rules table (before with commas price
was not good displayed - without decimals)

Test Plan :
1) Set your currency format on 'FR' and 'fine' OR/AND 'overduefinescap'
with commas
2) Be sure to have some patron overdues
3) Run ~/misc/cronjobs/fines.pl with args to find overdues
4) See an error like 'isn't numeric in substraction[..] or gt > [...]'
5) Run updatedatabase script (it will replace commas in your rules
changed in step 1) )
6) Repeat step 3 and see that everything was going "fine" (:tada:)

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>