satellite/satellitedb: no orders for exited nodes

We should not be sending any type of orders to nodes that have completed
graceful exit with the current satellite. In particular, we should not
be trying to audit them, because that would be silly.

Change-Id: Ie2153e5739914ab696feefcdef28545ed70f84e4

satellite/satellitedb/overlaycache.go

@@ -156,6 +156,7 @@ func (cache *overlaycache) GetOnlineNodesForGetDelete(ctx context.Context, nodeI
 		FROM nodes
 		WHERE id = any($1::bytea[])
 			AND disqualified IS NULL
+			AND exit_finished_at IS NULL
 			AND last_contact_success > $2
 	`), postgresNodeIDList(nodeIDs), time.Now().Add(-onlineWindow))
 	if err != nil {