[embeddingAPI][XWALK-2350] Optimize the embeddingAPI test cases according to the latest spec developer provided

- Optimize the embeddingAPI test cases according to the latest spec developer privided.
- Change some test methods name to avoid the same id.
- Leverage some cases from unit tests.
- Failure analysis: feature is not supported.

Impacted tests(approved): new 0, update 89, delete 0
Unit test platform: [Android]
Unit test result summary: pass 86, fail 3, block 0
[webapi][xwalk-2123] Update exception name in tests.xml

- Tests have been updated in PR#861, update test purpose in tests.xml
- Pass on Crosswalk 9.38.202.0, but fail on Crosswalk 9.38.199.0

Impacted tests(approved): new 0, update 5, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 5, fail 0, block 0
[usecase-embeddingAPI][XWALK-2426] add two usecases for multiple views

- Failure analysis: multiple surfaceViews can not in sort when rotating the screen 90 degrees.

Impacted tests(approved): new 2, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 1, fail 1, block 0
Merge pull request #884 from haoxli/haoxli/webapi/xwalk-2123-tests.xml

[webapi][xwalk-2123] Update exception name in tests.xml
Merge pull request #880 from zhuyongyong/yongzhu/embeddingAPI/latestSpec

[embeddingAPI][XWALK-2350] Optimize the embeddingAPI test cases
Merge pull request #886 from zhuyongyong/yongzhu/embeddingAPI-usecase/addMultiViews

[usecase-embeddingAPI][XWALK-2426] add two usecases for multiple views