[wrt]Update wrt-packagemgt-tizen-tests

Impacted TCs num(approved): New 0, update 1, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 1, Fail  0, Blocked  0
Merge pull request #382 from linshen/update-wrt-packagemgt

[wrt]Update wrt-packagemgt-tizen-tests