Bug 11629 - Add ability to update not for loan status on checkin

Bug 11629 - Add ability to update not for loan status on checkin

Some libraries would like to streamline the cataloging process my
automatically updating notforloan values on checkin. For example, an
item is set to notforloan of -1 ( ordered ). The item, is received,
processed, and checked in for the first time before being shelved.
The checkin automatically changes the nfl value from -1 to 0. The
same workflow could be used for damaged items as well.

Test Plan:
1) Apply this patch
2) Run updatedatabase.pl
3) Set the new system preference UpdateNotForLoanStatusOnCheckin
   to the following:
-1: 0
0: 1
4) Create an item, set its notforloan value to -1
5) Check in the item, note its not for loan value is now 0
6) Check in the item again, note its not for loan value is now 1
7) Check in the item again, note its not for loan value reamins 1

Signed-off-by: Havilah Lyon <havilah@aflibrary.org>
Signed-off-by: Katrin Fischer <Katrin.Fischer.83@web.de>
Testing notes on last patch.

Signed-off-by: Galen Charlton <gmc@esilibrary.com>