set is_urdf_loaded__ of the resource manager to true (#896)

it's probably needed after ros-controls/ros2_control@385293e

fixes #893

Co-authored-by: Olivier Michel <[email protected]>

Author: skpawar1305

webots_ros2_control/src/Ros2Control.cpp

@@ -99,6 +99,7 @@ namespace webots_ros2_control {
       resourceManager->set_component_state(controlHardware[i].name, active_state);
 #else
       resourceManager->activate_all_components();
+      resourceManager->load_urdf(urdfString, false, false);
 #endif
     }