[misc]move wrt-usecase-behavior-tests to wrt-usecase-tizen-tests

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 0, deleted 0
Unit test platform: [tizen]
summary: pack to wgt and xpk pass,all tcs can showing normally
Merge pull request #455 from linshen/move-usecase

[misc]move wrt-usecase-behavior-tests to wrt-usecase-tizen-tests