message: Fix MakeTestWorldHighway
diff: @@ -139,6 +139,9 @@ WorldPtr modules::world::tests::MakeTestWorldHighway() {
  ExecutionModelPtr exec_model(new ExecutionModelInterpolate(params));
  DynamicModelPtr dyn_model(new SingleTrackModel(params));
  BehaviorModelPtr beh_model(new BehaviorConstantVelocity(params));
  + BehaviorModelPtr beh_model1(new BehaviorConstantVelocity(params));
  + BehaviorModelPtr beh_model2(new BehaviorConstantVelocity(params));
  + BehaviorModelPtr beh_model3(new BehaviorConstantVelocity(params));
  Polygon car_polygon = CarRectangle();
  State init_state1(static_cast<int>(MIN_STATE_SIZE));
  @@ -150,7 +153,7 @@ WorldPtr modules::world::tests::MakeTestWorldHighway() {
  State init_state2(static_cast<int>(MIN_STATE_SIZE));
  init_state2 << 0.0, 10.0, -1.75, 0.0, 5.0;
  - AgentPtr agent2(new Agent(init_state2, beh_model, dyn_model, exec_model,
  + AgentPtr agent2(new Agent(init_state2, beh_model1, dyn_model, exec_model,
  car_polygon, params, goal_ptr, map_interface,
  Model3D())); // NOLINT
  agent2->SetAgentId(2);
  @@ -163,7 +166,7 @@ WorldPtr modules::world::tests::MakeTestWorldHighway() {
  State init_state3(static_cast<int>(MIN_STATE_SIZE));
  init_state3 << 0.0, 20.0, -1.75, 0.0, 5.0;
  - AgentPtr agent3(new Agent(init_state3, beh_model, dyn_model, exec_model,
  + AgentPtr agent3(new Agent(init_state3, beh_model2, dyn_model, exec_model,
  polygon, params, goal_ptr, map_interface,
  Model3D())); // NOLINT
  agent3->SetAgentId(3);
  @@ -173,7 +176,7 @@ WorldPtr modules::world::tests::MakeTestWorldHighway() {
  // Adding a fourth agent in right lane
  State init_state4(static_cast<int>(MIN_STATE_SIZE));
  init_state4 << 0.0, 5.0, -5.25, 0.0, 5.0;
  - AgentPtr agent4(new Agent(init_state4, beh_model, dyn_model, exec_model,
  + AgentPtr agent4(new Agent(init_state4, beh_model3, dyn_model, exec_model,
  polygon, params, goal_ptr, map_interface,
  Model3D())); // NOLINT
  agent4->SetAgentId(4);
  