send obstacle distance data in onboard mode such that they are

received by the gcs when using mavlink router

src/modules/mavlink/mavlink_main.cpp

@@ -1659,6 +1659,7 @@ Mavlink::configure_streams_to_default(const char *configure_single_stream)
 		configure_stream_local("LOCAL_POSITION_NED", 30.0f);
 		configure_stream_local("NAMED_VALUE_FLOAT", 10.0f);
 		configure_stream_local("NAV_CONTROLLER_OUTPUT", 10.0f);
+		configure_stream_local("OBSTACLE_DISTANCE", 10.0f);
 		configure_stream_local("ODOMETRY", 30.0f);
 		configure_stream_local("OPTICAL_FLOW_RAD", 10.0f);
 		configure_stream_local("ORBIT_EXECUTION_STATUS", 5.0f);