[webapi] Change the promise cases to auto tests

Impacted tests(approved): new 0, update 0, delete 0
Unit test platform: [Android]
Unit test result summary: pass 4, fail 0, block 0
Merge pull request #652 from zhuyongyong/yongzhu/webapi/promise-auto

[webapi] Change the promise cases from menual tests to auto tests
[misc] Add testapp to web-mbat-tests

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 4, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 4, Fail 0, Blocked 0
Merge pull request #622 from linshen/update-mbat

[misc] Add testapp to web-mbat-tests
[wrt] Add config.xml in packagemgt wgt

Impacted tests(approved): new 0, update 9, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 9, fail 0, block 0
[webapi] update unitcommon.js for w3c nfc

- remove useless functions
- correct some type mistakes
- Failure analysis: nfc does not support

Impacted tests(approved): new 0, update 0, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 0, fail 12, block 0
Merge pull request #642 from Honry/Honry/misc-webapi-update-inst.wgt

[usecase-webapi] Fix issue of installing fail
[misc-xwalk] Integrate tests of NavigatorLanguage.

-Fail Reason: Cannot read property 'setAcceptLanguages' of undefined at Object

Impacted tests(approved): New 1, Update 0, Delete 0
Unit test platform: [Android]
Unit test result summary: Pass 0, Fail 1, Block 0
Merge pull request #635 from minxhuang/hm/misc/xwalk-system/Navigator_Language

[misc-xwalk] Integrate tests of NavigatorLanguage.
Merge pull request #654 from haoxli/haoxli/wrt/packmg-wgt-config

[wrt] Add config.xml in packagemgt wgt
[cordova] Add 2 TCs to sampleapp
Merge pull request #625 from wanghongjuan/wanghongjuan/wrt/cordova

[cordova] Add 2 TCs to sampleapp
[misc] Recover test files integrated from Blink LayoutTests

- https://github.com/crosswalk-project/blink-crosswalk/tree/master/LayoutTests
- https://github.com/crosswalk-project/crosswalk-test-suite/pull/635
[misc] Update navigator.language test files

to reflect current being code structure
[usecase-webapi] Improve usecase for updating set name

- Categery:follow tizen.org catgory, update follow the set name
Merge pull request #655 from zhangjingx/zjx/webapi/nfc_modify

[webapi] update unitcommon.js for w3c nfc
[usecase-webapi] Improve FileSystem usecase

- Delete the exist file before creating the file again

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: pass 1, fail 0, block 0
[misc] Describe why need tests for NavigatorLanguage
[webapi][XWALK-1877] Fix bug 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
Merge pull request #656 from minxhuang/hm/webapi/sso-hotfix

[webapi][XWALK-1877] Fix bug of sso.