[wrt][XWALK-1947/2391/2394] Add 11 new cases for wrt android
[xwalkdriver] Update xwalkdriver for android & tizen

 - update webdriver.cfg for deferent platforms
 - Pack WGT zip
Merge pull request #867 from kangxu/kangxu/wrt/wrt-packertoolmanu-android-tests/addCases

[wrt][XWALK-1947/2391/2394] Add 11 new cases for wrt android
[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