fence_scsi_check: watchdog script for fence_scsi
    
    This fence_scsi_check watchdog script will check to see is the local
    node's key is registered with any devices. If the key is registered with
    at least one device, the script will return 0. If none of the devices
    have the node's key registered (ie. it has been fenced), the script will
    return 2 and node will reboot via watchdog.
    
    Signed-off-by: Ryan O'Hara <rohara@redhat.com>
    Reviewed-by: Fabio M. Di Nitto <fdinitto@redhat.com>