Updated the launch files.

launch/keyboard_teleop.launch

@@ -5,7 +5,7 @@
   <arg name="ns"            default="helena" />
   <arg name="path"          default="$(find iri_teleop_launch)"/>
   <arg name="config_file"   default="$(arg path)/config/keyboard_teleop.yaml" />
-  <arg name="twist_topic"   default="/$(arg ns)/teleop/cmd_vel"/>
+  <arg name="twist_topic"   default="/$(arg ns)/cmd_vel"/>
   <arg name="output"        default="screen" />
   <arg name="launch_prefix" default="" />
 

launch/ps3_teleop.launch

@@ -5,7 +5,7 @@
   <arg name="ns"            default="helena" />
   <arg name="path"          default="$(find iri_teleop_launch)"/>
   <arg name="config_file"   default="$(arg path)/config/ps3_bt_teleop.yaml" />
-  <arg name="twist_topic"   default="/$(arg ns)/helena/teleop/cmd_vel"/>
+  <arg name="twist_topic"   default="/$(arg ns)/cmd_vel"/>
   <arg name="joy_topic"     default="/$(arg ns)/joy"/>
   <arg name="run_joy"       default="true"/>
     <arg name="device"          default="/dev/input/js0" />