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

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 4, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 3, Fail 0, Blocked 1
Block: ApplicationInvisible, IVI cannot background.