[usecase] Add new SecureElement tests for tizen use case

- Add secure element tests
- This tests depend on some Secure Element

Impacted TCs num(designed): New 1, Update 0, Delete 0
Unit test Platform: Tizen M0
Tizen test result summary: Pass 0, Fail 1, Blocked 0
[webapi][XWALK-1877] Add cases to test attributions and methods of sso.

- Block Reason: tizen.sso not implement.

Impacted tests(approved): New 28, Update 0, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 0, Fail 0, Block 28
[wrt] Update case status for wrt-packertoolauto-android-tests
Merge pull request #494 from kangxu/kangxu/wrt/wrt-packertoolauto-android-tests/updatestatus

[wrt] Update case status for wrt-packertoolauto-android-tests
Clean up messageport-ivi which was missed by #487
Ignore backup files, generated files, etc
Remove vim "swap" files (.swp)

- Temporary files created by vim while you are editing a file
Merge pull request #506 from zqzhang/zqzhang/cleanup

Clean up messageport-ivi which was missed by #487 and auto-generated files
[embedding][XWALK-895] Add new embedding api tests for crosswalk

- Add 80 cases about the unit tests for embedding api
- Failure analysis:8 cases are failed because the methods of embedding api are not exist.
Others are failed or blocked because the methods of embedding api do not support.

Impated TCs num(approved): New 80, Update 0, Delete 0
Unit test platform: [Android]
Android Test result summary: Pass 68, Fail 12, Blocked 4
[webapi][XWALK-2101]update attribute name for audiosystem

- Fail Reason: The error callback is invoked.

Impacted TCs num(approved): New 0, Update 3, Delete 0
Unit test Platform: [Tizen-IVI]
Test result summary: Pass 0, Fail 3, Blocked 0
Merge pull request #507 from JianfengXu/xujf/audiosystem/2102

[webapi][XWALK-2101]update attribute name for audiosystem
[xwalkdriver] Add tests.xml for xwalkdriver tests

- Add tests.xml for testskit-lite
- Improve Android test steps
- Pack APK zip
Add WebAudio crashing sample
Merge pull request #515 from platogo/webaudio

WebAudio crashing sample
Merge pull request #479 from haoxli/haoxli/webdriver/tests.xml

[xwalkdriver] Add tests.xml for xwalkdriver tests
[usecase-wrt]move usecase to separate folder

[Detailed commit message (if have)]
Impacted TCs num(approved): move all usecase to separate folder
Unit test platform: [android]
Unit test result summary: Pack to apk and isntall to verify the page showing ok
[wrt] Rename folder and update tcs for wrt extension
Merge pull request #518 from linshen/update-usecase-android

[usecase-wrt]move usecase to separate folder
Merge pull request #517 from kangxu/kangxu/wrt/wrt-extension-android-tests/update

[wrt] Rename folder and update tcs for wrt extension
[wrt]update config.xml change the id format for wgt install

[Detailed commit message]
Impacted TCs num(approved): New 0, update 0, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 0, Fail 0, Blocked 0