[webapi][XWALK-1726] Update case code style for screenorientation

- Rename Screen_lockOrientation_parameter_rigth.html to Screen_lockOrientation_parameter_right.html, this case prove the default orientation is landspace defined by config.xml.wgt and Screen_unlockOrientation_base.html prove that the default orientation can be changed.
- All case pass on Tizen MO, but fail on Tizen IVI. Beacuas screen.orientation not support on IVI.

Impacted tests(approved): new 1, update 13, delete 0
Unit test platform: Tizen IVI, Tizen M0
Tizen IVI result summary: pass 0, fail 14, block 0
Tizen M0 result summary: pass 14, fail 0, block 0
Merge pull request #226 from xinliux/xinliux/webapi/XWALK-1726

[webapi][XWALK-1726] Update case code style for screenorientation