Initial WebDriver framework checkin.

This is the initial checkin of the webdriver framework.
Revert "Initial WebDriver framework checkin."

This reverts commit 5ca157c64326d29e43254a3752b45f9fc4592c5c.
WebDriver framework checkin.

Initial checkin of framework to write WebDriver tests for ODL.
Merge pull request #1 from violinlakshmi/webdriver

Webdriver