LP 1507807: Add org unit settings for in-house-use copy alerts.

LP 1507807: Add org unit settings for in-house-use copy alerts.

Add circ.in_house_use.copy_alert and circ.in_house_use.checkin_alert
org. unit setting types to seed data and upgrade script.

No default values are provided for the new settings.  They are not
defined (i.e. off) by default.

Add a PgTap test to verify that the org. unit setting types exist in
the database.

See the release notes for what these settings do.

Signed-off-by: Jason Stephenson <jason@sigio.com>
Conflicts:
	Open-ILS/src/sql/Pg/950.data.seed-values.sql