LP195405-TPac: hold status not looking for shelf delay status

LP195405-TPac: hold status not looking for shelf delay status

This patch fixes the blank status display in the TPac opac by
treating that status as a 'Waiting for Copy' status.

To Test:
As stated by Erica in LP1959405
1. Administration->Local Administration->Library Settins Editor
set Hold Shelf Status Delay to 1 minute.
2. Place a hold for a patron
3. Capture the hold.
   The opac will change from "Waiting for Copy" to a blank column.
4. Allow the delay interval to expire
   The opac will change from a blank status to "Available"

5. Apply the patch
6. Repeat 2-3.
   The opac will continue to display "Waiting for Copy"
7. Allow the delay interval to expire
   The opac will change from "Waiting for Copy" to "Available"

Signed-off-by: Garry Collum <gcollum@gmail.com>