Upgraded to released version of 2.1.0 and removed logging.

build.xml

@@ -31,8 +31,6 @@
       <arg value="grid_configuration.yml"/>
       <arg value="-hubConfig"/>
       <arg value="hub_configuration.json"/>
-      <arg value="-log"/>
-      <arg value="hub.log"/>
     </java>
   </target>
 

default.properties

@@ -1,4 +1,4 @@
-selenium.version=2.1.0-snapshot
+selenium.version=2.1.0
 
 hub.host=qa-selenium.mv.mozilla.com
 hub.port=4444