Shift and fix test cases of Video Block from edx-platform#144

farhan wants to merge 2 commits intofarhan/video-block-fixesopenedx/xblocks-contrib:farhan/video-block-fixesfrom

farhan/move-video-block-test-casesopenedx/xblocks-contrib:farhan/move-video-block-test-casesCopy head branch name to clipboard