Merge pull request #157 from ainilife/biz-abtest

add unit tests
touched
Merge branch 'biz' of github.com:dianping/cat into biz
Update .travis.yml
Update .travis.yml
try to fix test failures by adding timezone support to PlainTestMessageCodec
Merge pull request #158 from unidal/biz

fix test failures by adding timezone support to PlainTestMessageCodec
fix test failure
fix one more timezone related test failure
Merge pull request #159 from unidal/biz

fix test failure
add two unit tests into AllTest.java
Merge branch 'biz' of https://github.com/dianping/cat into biz-abtest
Refactor the ABTestServiceImpl