fix(autoware_launch): perception mode (#249)

Signed-off-by: Yukihito Saito <yukky.saito@gmail.com>

autoware_launch/launch/autoware.launch.xml

@@ -34,7 +34,7 @@
   <arg name="rviz" default="true" description="launch rviz"/>
   <arg name="rviz_config" default="$(find-pkg-share autoware_launch)/rviz/autoware.rviz" description="rviz config"/>
   <!-- Perception -->
-  <arg name="perception_mode" default="camera_lidar_fusion" description="select perception mode. camera_lidar_radar_fusion, camera_lidar_fusion, lidar_radar_fusion, lidar, radar"/>
+  <arg name="perception_mode" default="lidar" description="select perception mode. camera_lidar_radar_fusion, camera_lidar_fusion, lidar_radar_fusion, lidar, radar"/>
   <arg name="traffic_light_recognition/enable_fine_detection" default="true" description="enable traffic light fine detection"/>
 
   <!-- Global parameters -->