[usecase-webapi] Add new Vehicle tests for tizen usecase

- Add Vehicle Information Access API tests.
- Failure reason: can't get vehicle speed.

Impacted TCs num(designed): New 1, Update 0, Delete 0
Unit test Platform: Tizen M0, Tizen IVI
Tizen test result summary: Pass 0, Fail 1, Blocked 0
Merge pull request #509 from xinliux/xinliux/usecase/vehicle

[usecase-webapi] Add new Vehicle tests for tizen usecase