Update launch files

launch/description.launch

 <?xml version="1.0" encoding="UTF-8"?>
 <launch>
 
-  <arg name="name"  default="dabo"/>
-  <arg name="model" default="dabo"/>
+  <arg name="ns"            default="dabo"/>
+  <arg name="model"         default="dabo"/>
   <arg name="static_wheels" default="false" />
 
-  <group ns="$(arg name)">
+  <group ns="$(arg ns)">
     
     <param name="robot_description"
-         command="$(find xacro)/xacro --inorder '$(find iri_dabo_description)/urdf/$(arg model).xacro' name:=$(arg name)" />
+         command="$(find xacro)/xacro --inorder '$(find iri_dabo_description)/urdf/$(arg model).xacro' name:=$(arg ns)" />
 
     <node pkg="robot_state_publisher" type="state_publisher" name="state_publisher">
-      <param name="tf_prefix" type="string" value="/$(arg name)"/>
+      <param name="tf_prefix" type="string" value="/$(arg ns)"/>
       <param name="publish_frequency" type="double" value="20.0"/>
     </node>
 
@@ -20,8 +20,8 @@
           type="joint_state_publisher"
           name="joint_state_publisher">
       <param name="use_gui"           value="true"/>
-      <remap from="$(arg name)/joint_states" to="$(arg name)/joint_states/"/>
-      <remap from="$(arg name)/robot_description" to="$(arg name)/robot_description/"/>
+      <remap from="$(arg ns)/joint_states" to="$(arg ns)/joint_states/"/>
+      <remap from="$(arg ns)/robot_description" to="$(arg ns)/robot_description/"/>
     </node>
     -->
 
@@ -29,13 +29,13 @@
   
   <group if="$(arg static_wheels)">
     <include file="$(find iri_segway_rmp200_description)/launch/wheel_static_transform.launch">
-      <arg name="name" value="$(arg name)"/>
+      <arg name="name" value="$(arg ns)"/>
     </include>
   </group>
 
   
   <include file="$(find iri_segway_rmp200_description)/launch/caster_wheels_static_transform.launch">
-    <arg name="name" value="$(arg name)"/>
+    <arg name="name" value="$(arg ns)"/>
   </include>
 
 </launch>
\ No newline at end of file

launch/test.launch

@@ -2,12 +2,15 @@
 <launch>
 
   <include file="$(find iri_dabo_description)/launch/description.launch">
-    <arg name="name"  value="dabo"/>
-    <arg name="model" value="dabo"/>
+    <arg name="ns"            value="dabo"/>
+    <arg name="model"         value="dabo"/>
     <arg name="static_wheels" value="true"/>
   </include>
   
-  <node pkg="rviz" type="rviz" name="rviz" args="-d $(find iri_dabo_description)/rviz/dabo.rviz">
+  <node pkg="rviz"
+        type="rviz"
+        name="rviz"
+        args="-d $(find iri_dabo_description)/rviz/dabo.rviz">
   </node>
 
 </launch>
\ No newline at end of file