Fix urdf package name

launch/realsense_test.launch

@@ -5,7 +5,7 @@
   <arg name="camera_name" default="camera"/>
 
   <param name="robot_description"
-         command="$(find xacro)/xacro --inorder '$(find realsense2_camera)/urdf/test_d435_camera.urdf.xacro'" />
+         command="$(find xacro)/xacro --inorder '$(find realsense2_description)/urdf/test_d435_camera.urdf.xacro'" />
 
   <include file="$(find iri_realsense_depth_bringup)/launch/realsense.launch">
     <arg name="config_file" value="$(arg config_file)"/>