Planning: fixed a navi planning integration config file bug.

modules/planning/integration_tests/navigation_mode_test.cc

@@ -35,6 +35,8 @@ class NavigationModeTest : public PlanningTestBase {
  public:
   virtual void SetUp() {
     FLAGS_use_navigation_mode = true;
+    FLAGS_planning_config_file =
+        "modules/planning/conf/planning_config_navi.pb.txt";
     FLAGS_test_data_dir = "modules/planning/testdata/navigation_mode_test";
     FLAGS_traffic_rule_config_filename =
         "modules/planning/conf/navi_traffic_rule_config.pb.txt";