[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
[wrt] Update script to support multiple
[wrt]update packertool to supprt env devices

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 2, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 2, Fail 0, Blocked 0
Merge pull request #790 from kangxu/kangxu/wrt/shellauto/updateCases

[wrt] Update script to support multiple
Merge pull request #787 from linshen/wrt/change-host-mutil

[wrt]update packertool to supprt env devices