New hold status for "Wrong Shelf"

New hold status for "Wrong Shelf"

Adds a new hold status code (8) to indicate when a hold is sitting on
the wrong holds shelf.

In the OPAC, a hold status of 8 is displayed as in-transit.  Neither
waiting-for-copy or in-transit are entirely accurate.  In-transit makes
slightly more sense, since the copy is captured and (slowly) making its
way to the correct shelf.

Signed-off-by: Bill Erickson <berick@esilibrary.com>