[wrt][XWALK-1498]update tct-rt02-wrt-tests behavior tcs

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 1, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 0, Fail 0, Blocked 1
Merge pull request #768 from linshen/wrt/xwalk-1497

[wrt][XWALK-1498][XWALK-1497] update tct-rt02-wrt-tests behavior tcs