Develop script that will drive Selenium for the load testing

[atsakiridis]

The key here is that we want concurrency in the tests and most tools out there seem to be testing serially unless when employing the Selenium Grid, which seems overkill, at least for now.

Was thinking of using node since we already employ it for some server side testing logic, but it's single threaded. Then I though of perl since some of our scripts are already in python, but doesn't seem that well supported. So I decided to go with Python which seems pretty well supported and has very nice high level threading facilities to get the job done with much less code than Java.

Also let's consolidate all testing to this script, i.e. invoke all other scripts needed for the test scenario so that everything is setup before the scenario is run, and everything is torn down after scenario is run (currently there's a lot of manual testing involved)