[webapi][XWALK-2372] Update screen orientation tests to reflect chromium 38 implementation

- Update screen orientation follow latest spec: http://w3c.github.io/screen-orientation/
- Failure reason: lock(), unlock(), type, angle and onchange all attributes of ScreenOrientation are undefined.

Impacted TCs num(approved): New 0, Update 14, Delete 0
Unit test Platform: Tizen IVI
Tizen test result summary: Pass 2, Fail 12, Blocked 0
Merge pull request #814 from xinliux/xinliux/webapi/XWALK-2372

[webapi][XWALK-2372] Update screen orientation tests to reflect chromium...