No config folder in move_base_laser.launch

[NazishT]

The following lines exist in move_base_laser.launch in turtlebot_navigation/laser/move_base_laser.launch file.

    <rosparam file="$(find turtlebot_navigation)/config/global_costmap_params.yaml" command="load" />  

however, there is no config folder.

Instead these lines should be:

   <rosparam file="$(find turtlebot_navigation)/param/global_costmap_params.yaml" command="load" /> 

pointing towards local and global costmap param.yaml files in turtlebot_navigation/param folder.