[usecase-webapi] Add usecase for sso.

-Fail Reason: tizen.sso not implement.

Impacted tests(designed): New 1, Update 0, Delete 0
Unit test platform: [Tizen IVI]
Unit test result summary: Pass 0, Fail 1, Block 0
Merge pull request #501 from minxhuang/hm/misc/usecase-tizen/sso

[usecase-webapi] Add usecase for sso.