Merge pull request #164 from ainilife/biz

Two new unit tests
move two merger test from home into consumer
add unit test for ProblemAnalyzer
Refactor test and add unit test for TopAnalyzer
Merge branch 'biz' of https://github.com/dianping/cat into biz
Merge branch 'biz' of http://code.dianpingoa.com/arch/cat into biz
modify the cat trace info in cat appender
merger from dianping