laserplugin: too much warnings

[MatthijsBurgh]

Warning produced by

ed_sensor_integration/ed_sensor_integration/src/laser/laser_plugin.cpp

Lines 92 to 103 in f1f1ca8

	try
	{
	geometry_msgs::TransformStamped gm_sensor_pose;
	gm_sensor_pose = tf_buffer_.lookupTransform("map", scan->header.frame_id, scan->header.stamp);
	scan_buffer_.pop();
	geo::Pose3D sensor_pose;
	geo::convert(gm_sensor_pose.transform, sensor_pose);
	update(world, scan, sensor_pose, req);
	}
	catch(tf2::ExtrapolationException& ex)
	{
	ROS_WARN_STREAM_DELAYED_THROTTLE(60, "ED Laserplugin: " << ex.what());

Often the requested time it too new.