should run batch test in sequence
Fix automation test script.

The test cases should be run in sequence.
Set default timeout time to 8 seconds.
Exclude some un-verified test cases, they would be added again.
Add a file to list all known failed test cases.
minor fix about some test cause so that they can run smoothly
Fix automation bugs, more test case would be run smoothly. Update failure list.
Fix automation minor bugs.
Merge pull request #2728 from yejingfu/automation

Automation