[misc] Add testapp to web-mbat-tests

[Detailed commit message (if have)]
Impacted TCs num(approved): New 0, update 4, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 4, Fail 0, Blocked 0
Merge pull request #622 from linshen/update-mbat

[misc] Add testapp to web-mbat-tests