Revert "Don't delay robot_controller_spawner"

This reverts commit e9c5ba0.

example_1/bringup/launch/rrbot.launch.py

@@ -105,12 +105,20 @@ def generate_launch_description():
         )
     )
 
+    # Delay start of robot_controller after `joint_state_broadcaster`
+    delay_robot_controller_spawner_after_joint_state_broadcaster_spawner = RegisterEventHandler(
+        event_handler=OnProcessExit(
+            target_action=joint_state_broadcaster_spawner,
+            on_exit=[robot_controller_spawner],
+        )
+    )
+
     nodes = [
         control_node,
         robot_state_pub_node,
         joint_state_broadcaster_spawner,
-        robot_controller_spawner,
         delay_rviz_after_joint_state_broadcaster_spawner,
+        delay_robot_controller_spawner_after_joint_state_broadcaster_spawner,
     ]
 
     return LaunchDescription(declared_arguments + nodes)