CAT-215 Lineitem MARC attribute definition sortkey

CAT-215 Lineitem MARC attribute definition sortkey

- Add Sortkey field to Acquisition Lineitem MARC Attribute
Definition fieldmapper object and DB table to allow ordering
of fields in Brief Records Add UI.

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>
 Changes to be committed:
	new file:   KCLS/sql/schema/deploy/cat-215-acqlimad-sortkey.sql
	new file:   KCLS/sql/schema/revert/cat-215-acqlimad-sortkey.sql
	modified:   KCLS/sql/schema/sqitch.plan
	modified:   Open-ILS/examples/fm_IDL.xml
	modified:   Open-ILS/web/js/ui/default/acq/picklist/brief_record.js

- Remove duplicate line in revert .sql file
- Change sortkey field to Integer
- Make sortkey fiel non-null and apply default value of 1

Signed-off-by: Kyle Huckins <khuckins@catalyte.io>
 Changes to be committed:
	modified:   KCLS/sql/schema/deploy/cat-215-acqlimad-sortkey.sql
	modified:   KCLS/sql/schema/revert/cat-215-acqlimad-sortkey.sql