[usecase][XWALK-2273] Fix issue for OpenFile_Test
[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
[sample-webapi] Integrate sample tests

 Impacted tests(approved): new 65, update 0, delete 0
 Unit test platform: [Tizen ivi][Android]
 Unit test result: All tests run normally
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
[usecase-embedding] Improve the pack.sh of embeddingAPI sample

Impacted tests(approved): new 0, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 10, fail 0, block 0
Merge pull request #777 from Honry/Honry/sample/create-sample

[sample-webapi] Integrate sample tests
Merge pull request #780 from zhuyongyong/yongzhu/embeddingAPI-sample/improve

[usecase-embedding] Improve the pack.sh of embeddingAPI sample