Minor chnages in the launch files (default -> value in the include)

launch/ivo_head_client_sim.launch

@@ -11,12 +11,12 @@
   </include>
 
   <include file="$(find tiago_head_module)/launch/tiago_head_client.launch">
-    <arg name="node_name"     default="$(arg node_name)" />
-    <arg name="output"        default="$(arg output)" />
-    <arg name="launch_prefix" default="$(arg launch_prefix)" />
-    <arg name="config_file"   default="$(arg config_file)" />
-    <arg name="move_action"   default="$(arg move_action)"/>
-    <arg name="point_action"  default="$(arg point_action)"/>
+    <arg name="node_name"     value="$(arg node_name)" />
+    <arg name="output"        value="$(arg output)" />
+    <arg name="launch_prefix" value="$(arg launch_prefix)" />
+    <arg name="config_file"   value="$(arg config_file)" />
+    <arg name="move_action"   value="$(arg move_action)"/>
+    <arg name="point_action"  value="$(arg point_action)"/>
   </include>
 
 </launch>

launch/tiago_head_client_sim.launch

@@ -13,12 +13,12 @@
   </include>
 
   <include file="$(find tiago_head_module)/launch/tiago_head_client.launch">
-    <arg name="node_name"     default="$(arg node_name)" />
-    <arg name="output"        default="$(arg output)" />
-    <arg name="launch_prefix" default="$(arg launch_prefix)" />
-    <arg name="config_file"   default="$(arg config_file)" />
-    <arg name="move_action"   default="$(arg move_action)"/>
-    <arg name="point_action"  default="$(arg point_action)"/>
+    <arg name="node_name"     value="$(arg node_name)" />
+    <arg name="output"        value="$(arg output)" />
+    <arg name="launch_prefix" value="$(arg launch_prefix)" />
+    <arg name="config_file"   value="$(arg config_file)" />
+    <arg name="move_action"   value="$(arg move_action)"/>
+    <arg name="point_action"  value="$(arg point_action)"/>
   </include>
 
 </launch>