Add tests for the object element
Update according to the review comments

1. Change the manual test to reference test
2. Refactor the events tests
3. Remove the usemap test
4. Update the test and assert descriptions and etc

Signed-off-by: xiaojunwu <xiaojunx.a.wu@intel.com>
Update according to review feedbacks
Rewrite the object-fallback.html
Resolve issues
Merge pull request #760 from xiaojunwu/submission/xiaojunwu/the-object-element

Add tests for the object element