RoutingTable createDummyRoutingTable() {
        RoutingTableSpec spec = new RoutingTableSpec(DocumentProtocol.NAME);
        spec.addRoute(new RouteSpec("storage/badger.bar"));
        RouteSpec storageCluster = new RouteSpec("storage/cluster.foo");
        storageCluster.addHop("bunnies");
        spec.addRoute(storageCluster);
        spec.addRoute(new RouteSpec("storage/otters.baz"));
        return new RoutingTable(spec);
    }
Test that receiving a WrongDistributionReply with a cluster state
we cannot parse fails the visiting session. We cannot visit anything
if we don't have a proper state anyway, so might as well fail fast.
documentapi/src/test/java/com/yahoo/documentapi/messagebus/MessageBusVisitorSessionTestCase.java