[xwalkdriver] Update xwalkdriver for android & tizen

 - update webdriver.cfg for deferent platforms
 - Pack WGT zip
[wrt]update testsprefix for manifest and packertool

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 0, deleted 0
Unit test platform: [tizen]
Unit test result summary:
tcs run block,BUGID:https://crosswalk-project.org/jira/browse/XWALK-1590
no tcs change, update README and execute path, pack and run the python script ok.
Merge pull request #871 from linshen/shenlin/wrt/optissue

[wrt]update testsprefix for manifest and packertool
Merge pull request #538 from yunxiaoxie/yunxiaoxie/webdriver

[xwalkdriver] Update xwalkdriver for android & tizen
[wrt] Remove unused common suites
Merge pull request #870 from kangxu/kangxu/wrt/wrtandroid/removeSuites

[wrt] Remove unused common suites
[usecase-wrt][XWALK-1668][XWALK-1649][XWALK-1731]Add 3 tcs for wrt-usecase-tizen-tests

[Detailed commit message (if have)]
Impacted TCs num(approved): New 1, update 1, deleted 0
Impacted TCs num(designed): New 2, update 0, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 2, Fail 0, Blocked 0
Merge pull request #863 from linshen/shenlin/usecase/audio-multiuser-pkgmgr

[usecase-wrt][XWALK-1668][XWALK-1649][XWALK-1731]Add 3 tcs for wrt-useca...
[wrt] Update suite.json for testapp
Merge pull request #876 from kangxu/kangxu/wrt/testappfolder/add

[wrt] Update suite.json for testapp
[wrt][WEBQA-146] Update config and py to fix issue
Merge pull request #879 from kangxu/kangxu/wrt/autojson/update

[wrt][WEBQA-146] Update config and py to fix issue
[wrt][XWALK-2496] Update case for wrt-rtcoremanu-android-tests
[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
Merge pull request #883 from kangxu/kangxu/wrt/wrt-rtcoremanu-android-tests/updateCases

[wrt][XWALK-2496] Update case for wrt-rtcoremanu-android-tests
[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