LP#1657237: Properly constrain matview trigger function

LP#1657237: Properly constrain matview trigger function

The function maintaining the reporter.hold_request_record table
was performing an unconstrained update when a hold was moved.  This
fixes that.

To test:

[1] Apply the patch, the perform an asset merge that would
    change the target of a hold request.  Verify that
    reporter.hold_request_record is properly update.

Signed-off-by: Mike Rylander <mrylander@gmail.com>
Signed-off-by: Galen Charlton <gmc@equinoxinitiative.org>
Signed-off-by: Bill Erickson <berickxx@gmail.com>