kr6r1820: replace deprecated xacro.py command

Author: cjue

kuka_kr6_support/launch/load_kr6r1820.launch

@@ -1,4 +1,4 @@
 <?xml version="1.0"?>
 <launch>
-  <param name="robot_description" command="$(find xacro)/xacro.py '$(find kuka_kr6_support)/urdf/kr6_r1820.xacro'"/>
+  <param name="robot_description" command="$(find xacro)/xacro '$(find kuka_kr6_support)/urdf/kr6_r1820.xacro'"/>
 </launch>

kuka_kr6_support/package.xml

@@ -52,6 +52,7 @@
   <author>G.A. vd. Hoorn (TU Delft Robotics Institute)</author>
   <author>Brett Hemes (3M)</author>
   <author email="timo.birnkraut@optonic.com">Timo Birnkraut (Optonic GmbH)</author>
+  <author email="christian.juelg@optonic.com">Christian Juelg (Optonic GmbH)</author>
   <maintainer email="g.a.vanderhoorn@tudelft.nl">G.A. vd. Hoorn (TU Delft Robotics Institute)</maintainer>
   <license>BSD</license>