Added the tf_prefix in the simulation configuration file.

urdf/camera.gazebo

@@ -36,7 +36,7 @@
           <cameraName>${properties['camera_name']}</cameraName>
           <imageTopicName>${properties['image_topic']}</imageTopicName>
           <cameraInfoTopicName>${properties['camera_info_topic']}</cameraInfoTopicName>
-          <frameName>${name}_camera_optical</frameName>
+          <frameName>${properties['tf_prefix']}/${name}_camera_optical</frameName>
           <hackBaseline>${properties['hack_baseline']}</hackBaseline>
           <distortionK1>${properties['distortion_K1']}</distortionK1>
           <distortionK2>${properties['distortion_K2']}</distortionK2>