XCOMMONS-442: Upgrade to Selenium 2.40

(cherry picked from commit b151f8b8e66d80d6cff31c434ed26cc6c20ac330)
XCOMMONS-442: Upgrade to Selenium 2.40
* Selenium Maven Plugin (latest 2.3) doesn't work with the latest version of Selenium (2.40.0). Fortunately we can run the old Selenium 1 tests without it.

(cherry picked from commit 9e2988b86e2399e129ea1c0f8c6a9674aa04cd55)