[webapi][XWALK-2470] Update 2 cases for SSO

Impacted TCs num: New 0, Update 2, Delete 0
Unit test Platform: [Tizen-IVI]
Unit test result summary: Pass 2, Fail 0, Blocked 0
Merge pull request #1065 from JianfengXu/xujf/sso/2470

[webapi][XWALK-2470] Update 2 cases for SSO