Modified default ouput topic name

launch/node.launch

@@ -7,7 +7,7 @@
   <arg name="config_file"     default="$(find iri_adc_tag_localization_filter)/config/params.yaml"/>
   <arg name="robot_name"      default="model_car"/>
   <arg name="ar_input_topic"  default="/$(arg robot_name)/ar_pose_marker"/>
-  <arg name="features_output_topic"  default="/$(arg robot_name)/features"/>
+  <arg name="features_output_topic"  default="~/features"/>
   <!-- <arg name="topic_name"  default="new_topic_name"/> -->
 
   <node name="$(arg node_name)"