initial python tests for videoalpha
test new specific feature of videoalpha
videoalpha: 100% coverage, pylint, pep8
fix MODEL_DATA in BaseTestXmodule
Tests from Video were copied
Fix tests from video to Videoalpha
use `location.html_id()` in tests
Add VideoAlpha HTML5  tests for display.coffee
work in progress
work in progress
Finish tests for html5_video.coffee