[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 4, Fail 11, Blocked 0
Fail reason:
Crosswalk_Xpk scripy:install updated xpk webapp fail
BUGID:https://crosswalk-project.org/jira/browse/XWALK-2290

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
Merge pull request #679 from linshen/update-package-0812

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