onnode: Be defensive when listing IPs of nodes with designated status.

onnode: Be defensive when listing IPs of nodes with designated status.

The current version gives the last item left after stripping the known
fields.  If an insufficent number of status fields is stripped then
this would return a residual status field value, which turned out to
be a valid IP address for localhost...  so no error occurs.

This change means that the node number is stripped and any residual
status field value will stay appended, causing an error the first time
this command is tested.

Signed-off-by: Martin Schwenke <martin@meltin.net>