[webapi] Update license to DSB from LICENSE 2.0

- Update LICENSE of the tests with Intel author to DSB from LICENSE 2.0
- The first author of FileSystemManager_addStorageStateChangeListener.html is Samsung, Intel is updater
Update pack.py to suport whether do signature operation or not
Merge pull request #1521 from haoxli/webapi/update-license

[webapi] Update license to DSB from LICENSE 2.0
Merge pull request #1520 from jiajiax/jiajiax/update_pack.py_signature

Update pack.py to suport whether do signature operation or not.
[webapi][XWALK-3204] Delete the duplicated case ID

- Delete the duplicated case ID background-002
[webapi] Format tests.xml and tests.full.xml

- Format tests.xml by 'xmllint --format tests.xml'
- Format tests.full.xml by 'xmllint --format tests.full.xml'
Merge pull request #1519 from chenxix/webapi/modify-background

[webapi][XWALK-3204] Delete the duplicated case ID
[behavior][XWALK-3119] Remove 2 subcases for CSP in behavior

- Due to tinyweb dose not support access origin now, remove related subcases firstly.

Impacted TCs num: New 0, Update 0, Delete 2
Unit test Platform: [Tizen-IVI]
Unit test result summary: Pass 0, Fail 0, Blocked 0
Merge pull request #1525 from JianfengXu/csp/3119

[behavior][XWALK-3119] Remove 2 subcases for CSP in behavior
[webapi][xwalk-3179] Revise timeout to 5000 from 500

- Change timeout to 5000, too short timeout will make test fail

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [IVI]
Unit test result summary: pass 1, fail 0, block 0
Merge pull request #1526 from haoxli/webapi/xwalk-3179-2

[webapi][xwalk-3179] Revise timeout to 5000 from 500
[usecase] Update usecase for Vehicle API

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [IVI]
Unit test result summary: pass 0, fail 1, block 0
Merge pull request #1528 from kangxu/webapi/usecase/Vehicle/update

[usecase] Update usecase for Vehicle API