LP#1206589: Temporary Fix for Org. Unit Settings History Bug

LP#1206589: Temporary Fix for Org. Unit Settings History Bug

This commit makes two changes to the coustl IDL entry.

1. It adds a retrieve permission of STAFF_LOGIN.  This at least
requires someone with staff permission to be able to view settings
history.

2. It fixed the primary key field from date_applied to id.  The
prior setting was just an outright error.

NOTE: This is intended as a short term fix for the Library Settings
Editor history feature.

Signed-off-by: Jason Stephenson <jstephenson@mvlc.org>
Signed-off-by: Ben Shum <bshum@biblio.org>