Bug 18001 - LocalHoldsPriority can cause multiple holds queue lines for same hold...

Bug 18001 - LocalHoldsPriority can cause multiple holds queue lines for same hold request

If LocalHoldsPriority is enabled, and a record level request has more
than one item that could fill that hold, there is a possibility that a
holds queue row will be generated for the request for each of the
available items!

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Joel Sasse <jsasse@plumcreeklibrary.net>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>