[behavior] Add 6 tests to tests.tizen.xml
Merge pull request #98 from kangxu/kangxu/behavior/tizen

[behavior] Add 6 tests to tests.tizen.xml
[wrt] [XWALK-1269] Add tcs for xwalk-command-line option in packer tool
[wrt] [XWALK-1411] Add tcs for keep-screen-on option in packer tool