Fix test compilation.

Author: tnull

lightning/src/routing/router.rs

@@ -1590,6 +1590,7 @@ mod tests {
 	use routing::network_graph::{NetworkGraph, NetGraphMsgHandler, NodeId};
 	use routing::router::{get_route, PaymentParameters, Route, RouteHint, RouteHintHop, RouteHop, RoutingFees};
 	use chain::transaction::OutPoint;
+	use chain::keysinterface::KeysInterface;
 	use ln::features::{ChannelFeatures, InitFeatures, InvoiceFeatures, NodeFeatures};
 	use ln::msgs::{ErrorAction, LightningError, OptionalField, UnsignedChannelAnnouncement, ChannelAnnouncement, RoutingMessageHandler,
 	   NodeAnnouncement, UnsignedNodeAnnouncement, ChannelUpdate, UnsignedChannelUpdate};