[behavior][misc] Chanage 3 tests for Camera and Power status to designed

- Camera is not supported in Tizen.
- Tizen-IVI can not set the display backlight time, Power is not supported in Tizen.

Impacted tests (approved): New 0, Update 0, Delete 3
Unit test Platform: Tizen IVI
Andriod test result summary: Pass 0, Fail 0, Blocked 0
[misc-usecase][XWALK-1071] Add a TC for filesystem tizen

- Add a filesystem TC for createfile and readfile
- Failure analysis: https://crosswalk-project.org/jira/browse/XWALK-1827

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
[webapi] Fix security issue form zap scan

- Set "HttpOnly" to all cookies
- Turn off AUTOCOMPLETE attribute in form input element
  containing password by using autocomplete="off"
Merge pull request #297 from haoxli/haoxli/webapi/zap-security-4

[webapi] Fix security issue form zap scan
Merge pull request #295 from JianfengXu/xujf/behavior/camera

[behavior][misc] Chanage 3 tests for Camera and Power status to designed
Merge pull request #286 from yunxliu/yunxliu/misc/filesystem

[misc-usecase][XWALK-1071] Add a test for Tizen File System API