lp1616170 Custom Copy Status checkin_ok Field

lp1616170 Custom Copy Status checkin_ok Field

- Add new config.copy_status fields for previously hardcoded
"Checkin Ok" situations, and Event text to the IDL and via SQL
- Refactor checkin subroutine check_checkin_copy_status

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>
 Changes to be committed:
	modified:   Open-ILS/examples/fm_IDL.xml
	modified:   Open-ILS/src/perlmods/lib/OpenILS/Application/Circ/Circulate.pm
	modified:   Open-ILS/src/sql/Pg/002.schema.config.sql
	modified:   Open-ILS/src/sql/Pg/950.data.seed-values.sql
	new file:   Open-ILS/src/sql/Pg/upgrade/XXXX.schema.lp1616170-custom-copy-status-maintainability.sql