Bug 28139: Handle Processing status with HoldsAutoFill pref turned on

Bug 28139: Handle Processing status with HoldsAutoFill pref turned on

To test:
 1: Turn on HoldsAutoFill setting
 2: Place a item-level hold on item X at Branch A
 3: Make the hold to Processing state:
 $ koha-mysql kohadev
 > select * from reserves; # look up the reserve_id
 > UPDATE reserves SET found = 'P', priority = 0 WHERE reserve_id = XXX;
 4: Check in the item X at Branch A - A pop-up asking confirmation comes
 5: Apply patch & restart plack
 6: Check in the item X again at Branch A - now the hold is confirmed automatically

Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>