message: updated test_rgbd_image.launch to test compressed_rate parameter of rgbd_sync
diff: </include>
  <arg name="compressed" default="false"/>
  + <arg name="compressed_rate" default="0"/>
  <group ns="camera">
  - <node pkg="nodelet" type="nodelet" name="rgbd_sync" args="load rtabmap_ros/rgbd_sync camera_nodelet_manager">
  + <node pkg="nodelet" type="nodelet" name="rgbd_sync" args="load rtabmap_ros/rgbd_sync camera_nodelet_manager" output="screen">
  <remap from="rgb/image" to="rgb/image_rect_color"/>
  <remap from="depth/image" to="depth_registered/image_raw"/>
  <remap from="rgb/camera_info" to="rgb/camera_info"/>
  + <param name="compressed_rate" value="$(arg compressed_rate)"/>
  </node>
  </group>
  <!-- RGB-D Odometry -->
  <node pkg="rtabmap_ros" type="rgbd_odometry" name="rgbd_odometry" output="screen">
  <param name="subscribe_rgbd" type="bool" value="true"/>
  - <remap from="rgbd_image" to="/camera/rgbd_image"/>
  + <remap if="$(arg compressed)" from="rgbd_image" to="/camera/rgbd_image/compressed"/>
  + <remap unless="$(arg compressed)" from="rgbd_image" to="/camera/rgbd_image"/>
  <param name="Odom/AlignWithGround" type="string" value="true"/>
  <param name="frame_id" type="string" value="camera_link"/>
  