[misc] Update WRT usecases for wrt-usecase-tizen-tests
[wrt] Update cases for format and test steps
Merge pull request #427 from kangxu/kangxu/wrt/wrt-integration-android-tests/updateSteps

[wrt] Update cases for format and test steps
Merge pull request #428 from wanghongjuan/wanghongjuan/misc/wrt-usecase