[webapi][XWALK-893] Add extension for iap
[wrt][XWALK-890]update test.py

1.add checkdb.sh
2.add nagative seed
3.update test.py
[wrt] [XWALK-332] Update TC steps for xwalk-332
Merge pull request #377 from yunxliu/yunxliu/webapi/change_iap_profiles

[webapi][XWALK-893] Add extension for iap
Merge pull request #392 from linshen/update-xwalk-890

[wrt][XWALK-890]update test.py
Merge pull request #393 from wanghongjuan/wanghongjuan/wrt/xwalk-332

[wrt] [XWALK-332] Update TC steps for xwalk-332