Use db_world as default for navigation

Author: fjp

diffbot_navigation/launch/diffbot_navigation.launch

@@ -1,7 +1,7 @@
 <launch>
   <!-- Arguments -->
   <arg name="model" default="diffbot" doc="model type [diffbot, remo]"/>
-  <arg name="map_file" default="$(find diffbot_navigation)/maps/map.yaml"/>
+  <arg name="map_file" default="$(find diffbot_navigation)/maps/db_world.yaml"/>
   <arg name="open_rviz" default="true"/>
   <arg name="move_forward_only" default="false"/>
   <arg name="local_planner" default="dwa" doc="Local planner can be either dwa, base, teb or pose"/>
@@ -31,4 +31,4 @@
     <node pkg="rviz" type="rviz" name="rviz" required="true"
           args="-d $(find diffbot_navigation)/rviz/$(arg model)_navigation.rviz"/>
   </group>
-</launch>
+</launch>