Suppress duplicate create notifications in the ___Approvals queue

Approval tests caught the duplicate notifications which occur via the
new owner on create scrip + existing NewPending rule.  Until rules are
replaced by appropriate scrips, squash duplicates by suppressing the
scrip's notification via an empty template.  AdminCcs always received
duplicate notifications via the same scrip (before it also included
Owner), and they are now fixed as well (for new installs).

Tests also needed adjustment for the extra notifications sent to Owners
on correspond, but these are expected.