[webapi][XWALK-2277] Fix the bug that fail to found TC when running sso

Impacted tests(approved): New 0, Update 23, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 0, Fail 23, Block 0
[usecase-webapi][XWALK-2406]Update test steps description for Content

- Fail Reason: When ran getDirectories method, neither callback was invoked.

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: [Tizen IVI]
Unit test result summary: Pass 0, Fail 1, Blocked 0
[webapi][XWALK-2363] Fix issue by using regexp to verify nativeAPIVersion of SystemInfo

- Because IVI platform version may be change, but TC set default nativeAPIVersion 2.2, so update version verfy by regexp.

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Tizen IVI
Tizen test result summary: Pass 1, Fail 0, Blocked 0
[embedding][XWALK-2239] Add one usecase to verfiy animatible.

- Add one usecase to verfiy animatible by leveraging developer's sample.
- Remove the redundant LoadAppFromManifestActivity.java and XWalkEmbeddingAPISample.java code.

Impacted tests(approved): new 1, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 1, fail 0, block 0
[usecase-embedding][XWALK-2327] Add one testpoint for show and hide in embedding sample.

- Add one testpoint in embedding sample for onshow and onhide.
- Remove the unserviceable code because XWalkView has done these.
- Change the url for OnHideOnShowActivity.

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Android]
Unit test result summary: pass 1, fail 0, block 0
[embedding][XWALK-2238] Add and update test cases for calling JS function and using XHR requests in XWalkView.

- Add test 2 cases for calling JS function with load and using XHR requests in XWalkView.
- Update 1 case for calling JS function with evaluateJavascript.

Impacted tests(approved): new 2, update 1, delete 0
Unit test platform: [Android]
Unit test result summary: pass 3, fail 0, block 0
[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
[wrt] Update android auto scripts
[wrt]Update host prefix path

[Detailed commit message (if have)]
Impacted TCs num(designed): New 0, update 4, deleted 0
Unit test platform: [tizen]
UT result: pass: 4, Fail 0
Merge pull request #847 from linshen/shen/wrt/update-manifest

[wrt]Update host prefix path
Merge pull request #845 from kangxu/kangxu/wrt/pyauto/updateScript

[wrt] Update android auto scripts
[wrt] Remove wrt invaid cases and update usecase
Merge pull request #850 from kangxu/kangxu/wrt/wrtandroid/updateCases

[wrt] Remove wrt invaid cases and update usecase
[sample] Update sreen orientation sample to reflect Chromium 38 implementation

However, the sample fails on my ZTE with canary 9.38.199.0
The layout shall be restored as before.

BUG=https://crosswalk-project.org/jira/browse/XWALK-2372
update README.md
Merge pull request #851 from jennycao/sample

[sample] update README.md
[sample] Improve test description and remove 2 tests

 Impacted test case: New 0, Update 25, Delete 2
 Unit test platform: Android, Window Chrome
 Unit test result: all tests run well
Merge pull request #853 from zqzhang/XWALK-2372

[sample] Update sreen orientation sample to reflect Chromium 38 implemen...
[sample] Fix typo issue
Merge pull request #854 from Honry/Honry/sample-feedback

[sample] Improve test description and remove 2 tests