XE-731: Upgrade to Selenium2 2.0a6
XE-731: Upgrade to Selenium2 2.0a6

* Revert since it seems some tests on hudson are failing now and the failures are probably caused by the ugrade. Since we're about to release 2.6RC1 it's not a good time to play with this right now. We need to analyze why these tests are failing after the upgrade.

git-svn-id: cf27bad30c6b7316185bdac65b014e8c16cd40b6@32278 f329d543-caf0-0310-9063-dda96c69346f

xwiki/xwiki-enterprise,xwiki/xwiki-enterprise