[usecase-webapi] Improve WebSocket usecase

- Adjust the case with screen view

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 1, fail 0, block 0
[usecase-webapi] Improve Audio usecase

- No need the auto replay, not auto hide the play bar for audio
- Add DisablePassButton and EnablePassButton

Impacted TCs num(designed): New 0, Update 1, Delete 0
Unit test Platform: Tizen M0
Tizen test result summary: Pass 1, Fail 0, Blocked 0
[usecase-webapi] Improve Application usecase

- Change "launch successfully" to "Please checking the app launched on GUI and service process commandline".
- Change "Kill APP" to "kill App".
- Show the current app info by default.
- Show static dialog for the list all info, using scroll bar.
- Change app information to table.
- Fail Reason: get context list fail.

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: [Tizen-IVI]
Test result summary: Pass 0, Fail 1, Blocked 0
[usecase-webapi] Improve content usecase

- Scan complete to a pop up, not open in new page.
- Organize result to a table.
- Default show get Directory result.
- Update the button to "Open Dir".
- Fail Reason: DB connection error.

Impacted TCs num: New 0, Update 1, Delete 0
Unit test Platform: [Tizen-IVI]
Test result summary: Pass 0, Fail 1, Blocked 0
[usecase-webapi] Add new Tizen tests for tizen usecase

- Add Tizen Filter tests
- Tests filter images by width and height.

Impacted TCs num(designed): New 1, Update 0, Delete 0
Unit test Platform: Tizen M0
Tizen test result summary: Pass 1, Fail 0, Blocked 0
[usecase-webapi][XWALK-1473] Fix bug for WebRTC

- Fix interface name
- Failure analysis: The ondatachannel event cannot be fired

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 1, block 0
[usecase-wrt] update wrt-usecase-tizen-tests
[misc] Integrate latest testharness.js framework into system tests

- http://github.com/w3c/testharness.js/
- commit b8c9ce09cd031e8a732bbfc0a8c81f674ffa8a49
[misc] Integrate W3C navigator.language test case

https://github.com/w3c/web-platform-tests/blob/master/workers/interfaces/WorkerUtils/navigator/language.html

BUG=https://crosswalk-project.org/jira/browse/XWALK-2242
[usecase-webapi] Improve Jsenhance usecase

- Use green pass/red fail instead of green/red rectangle to indicate pass or fail.
- remove style.css file

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: [Tizen-IVI]
Test result summary: Pass 1, Fail 0, Blocked 0
[wrt]update wrt-packagemgt-tizen-tests pack to xpk

[Detailed commit message (if have)]
update wrt-packagemgt-tizen-tests
Impacted TCs num(approved): New 0, update 15, deleted 1
Unit test platform: [tizen]
Unit test result summary: Pass 4, Fail 11, Blocked 0
Fail reason:
Crosswalk_Xpk scripy:install updated xpk webapp fail
BUGID:https://crosswalk-project.org/jira/browse/XWALK-2290

update wrt-digitalsign-tizen-tests
Impacted TCs num(approved): New 0, update 2, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 2, Fail 0, Blocked 0
Merge pull request #679 from linshen/update-package-0812

[wrt]update wrt-packagemgt-tizen-tests pack to xpk
Merge pull request #617 from linshen/update-usecase-tizen-804

[usecase-wrt] update wrt-usecase-tizen-tests
Merge pull request #629 from JianfengXu/xujf/application/update

[usecase-webapi] Improve Application usecase
Merge pull request #627 from xinliux/xinliux/usecase/audio-improve

[usecase-webapi] Improve Audio usecase
Merge pull request #626 from yunxliu/yunxliu/misc/webrtc_modify

[usecase-webapi][XWALK-1473] Fix bug for WebRTC
Merge pull request #595 from yunxliu/yunxliu/misc/webSocket

[usecase-webapi] Improve WebSocket usecase
Merge pull request #574 from zhangjingx/zhangjingx/misc/jsenhance

[usecase-webapi] Improve Jsenhance usecase
Merge pull request #473 from xinliux/xinliux/usecase/tizen

[usecase-webapi] Add new Tizen tests for tizen usecase
[behavior] Add subcase in tests xml

- Add subcase attribute in <testcase>
- Remove redundant element for behavior