Added snapshot build of Selenium 2.1.0 and enabled logging for the hub.

build.xml

@@ -31,6 +31,8 @@
       <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=2.0.0
+selenium.version=2.1.0-snapshot
 
 hub.host=qa-selenium.mv.mozilla.com
 hub.port=4444