[wrt][XWALK-1540]Fix XWALK-1540 update tcs for wrt-rtcore-tizen-tests

Impacted TCs num: New 0, Update 1, Delete 0
Unit test PLatform: [Tizen]
Tizen test result summary: Pass 1, Fail 0
Merge pull request #313 from linshen/fix-xwalk-1540

[wrt][XWALK-1540]Fix XWALK-1540 update tcs for wrt-rtcore-tizen-tests