Comment out gzclient and rviz for debugging

Author: ruffsl

nav2_simple_commander/launch/security_demo_launch.py

@@ -69,9 +69,9 @@ def generate_launch_description():
 
     ld = LaunchDescription()
     ld.add_action(start_gazebo_server_cmd)
-    ld.add_action(start_gazebo_client_cmd)
+    # ld.add_action(start_gazebo_client_cmd)
     ld.add_action(start_robot_state_publisher_cmd)
-    ld.add_action(rviz_cmd)
+    # ld.add_action(rviz_cmd)
     ld.add_action(bringup_cmd)
     ld.add_action(demo_cmd)
     return ld