update xml namespaces for hydro

ur_description/urdf/gazebo.urdf.xacro

 <?xml version="1.0"?>
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface">
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
   <gazebo>
-	<plugin name="gazebo_ros_controller_manager" filename="libgazebo_ros_controller_manager.so">
+  <plugin name="gazebo_ros_controller_manager" filename="libgazebo_ros_controller_manager.so">
       <alwaysOn>true</alwaysOn>
       <updateRate>1000.0</updateRate>
     </plugin>

ur_description/urdf/ur10.gazebo.xacro

 <?xml version="1.0"?>
-
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://ros.org/wiki/xacro">
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
 	<xacro:macro name="ur10_arm_gazebo" params="prefix">
 

ur_description/urdf/ur10.transmission.xacro

 <?xml version="1.0"?>
-
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://ros.org/wiki/xacro">
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
 	<xacro:macro name="ur10_arm_transmission" params="prefix">
 

ur_description/urdf/ur10.urdf.xacro

 <?xml version="1.0"?>
-
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://ros.org/wiki/xacro">
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
   <xacro:include filename="$(find ur_description)/urdf/ur10.transmission.xacro" />
   <xacro:include filename="$(find ur_description)/urdf/ur10.gazebo.xacro" />

ur_description/urdf/ur10_robot.urdf.xacro

 <?xml version="1.0"?>
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro"
        name="ur10" >
 
   <!-- common stuff -->

ur_description/urdf/ur5.gazebo.xacro

 <?xml version="1.0"?>
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://ros.org/wiki/xacro">
+  <xacro:macro name="ur5_arm_gazebo" params="name">
 
-	<xacro:macro name="ur5_arm_gazebo" params="name">
+    <gazebo reference="universal_robot">
+      <material>Gazebo/Blue</material>
+    </gazebo>
 
-	  <gazebo reference="universal_robot">
-	    <material>Gazebo/Blue</material>
-	  </gazebo>
-
-	</xacro:macro>
+  </xacro:macro>
 
 </robot>

ur_description/urdf/ur5.transmission.xacro

 <?xml version="1.0"?>
-
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://ros.org/wiki/xacro">
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
 	<xacro:macro name="ur5_arm_transmission" params="name">
 		

ur_description/urdf/ur5.urdf.xacro

 <?xml version="1.0"?>
-
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://ros.org/wiki/xacro">
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro">
 
   <xacro:include filename="$(find ur_description)/urdf/ur5.transmission.xacro" />
   <xacro:include filename="$(find ur_description)/urdf/ur5.gazebo.xacro" />

ur_description/urdf/ur5_robot.urdf.xacro

 <?xml version="1.0"?>
-<robot xmlns:sensor="http://playerstage.sourceforge.net/gazebo/xmlschema/#sensor"
-       xmlns:controller="http://playerstage.sourceforge.net/gazebo/xmlschema/#controller"
-       xmlns:interface="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
-       xmlns:xacro="http://playerstage.sourceforge.net/gazebo/xmlschema/#interface"
+<robot xmlns:xacro="http://www.ros.org/wiki/xacro"
        name="ur5" >
 
   <!-- common stuff -->