[wrt] Fix issue for android packertool and manifest automation
Rename webapi-sampleapp-embedding-tests to embeddingapi-usecase-tests

See requirement at pull request #769 comments
[webapi][xwalk-2309] Use launch instead of AppControl to throw WebAPIException

- AppControl is not supported in Crosswalk at now. Use launch() instead to throw WebAPIException.
- Fail Reason: Const attributes are not implemented(XWALK-2309); Wrong exception thrown(XWALK-1659); Error message is a empty string, no message info.

Impacted tests(approved): new 0, update 35, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 6, fail 27, block 0
Merge pull request #772 from haoxli/haoxli/webapi/update-tizen-tests

[webapi][xwalk-2309] Use launch instead of AppControl to throw WebAPIException
Merge pull request #770 from kangxu/kangxu/wrt/automation/update

[wrt] Fix issue for android packertool and manifest automation
[webapi] Update sign-flag position in suite.json

Signed-off-by: Hao yunfeix <yunfeix.hao@intel.com>
[usecase][XWALK-2273] Fix issue for OpenFile_Test
Merge pull request #773 from haoyunfeix/yunfei/update-webapi-sign-flag

[webapi] Update sign-flag position in suite.json
[usecase-cordova] Rename cordova-usecase-android-tests to cordova-usecase-tests

- Fail Reason: XWALK-2288, XWALK-2275

Impacted tests(approved): new 0, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 5, fail 2, block 0
Merge pull request #775 from haoxli/haoxli/usecase-cordova/rename

[usecase-cordova] Rename cordova-usecase-android-tests to cordova-usecase-tests
Merge pull request #774 from kangxu/kangxu/usecase/wrt-usecase-android-tests/fixIssue

[usecase][XWALK-2273] Fix issue for OpenFile_Test