LP#1819540 - Change expire list to match what the hold expire function

LP#1819540 - Change expire list to match what the hold expire function

Updated to use 'today'::timestamptz as suggested by Mike Rylander.

Testing:

1. Update a few holds that show up on the hold shelf so their shelf time
is set to now.

2. Confirm that you see them on the holds shelf.

3. Show clearable holds, holds are on the list.

4. Check in one of the items, and see that it goes back on the hold shelf.

After Fix Applies.

1. Update a few holds that show up on the hold shelf so their shelf time
is set to now.

2. Confirm that you see them on the holds shelf.

3. Show clearable holds, holds are no longer on the list.

Signed-off-by: Steven Callender <stevecallender@esilibrary.com>
Signed-off-by: Josh Stompro <stompro@stompro.org>
Signed-off-by: John Amundson <jamundson@cwmars.org>
Signed-off-by: Jason Stephenson <jason@sigio.com>