[wrt]update wrt-packagemgt-tizen-tests pack to xpk

[Detailed commit message (if have)]
update wrt-packagemgt-tizen-tests
Impacted TCs num(approved): New 0, update 15, deleted 1
Unit test platform: [tizen]
Unit test result summary: Pass 0, Fail 15, Blocked 0
Fail reason:
1. Crosswalk_Xpk scripy:install updated xpk webapp fail
2. Crosswalk_Tizen scripy: no function or file, will check the shell scipty

update wrt-digitalsign-tizen-tests
Impacted TCs num(approved): New 0, update 2, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 2, Fail 0, Blocked 0