Merge pull request #205 from ainilife/biz

more unit tests
remove unnecessary null check
Merge pull request #206 from ainilife/biz

refactor the code
Merge pull request #207 from youyong205/biz

Biz
modify the read me
add AggregationConfigManagerTest
modify the testcase
rename metric analyzer
modify the testcase
modify the test
modify the package name
modify the MetricConfigManagerTest
modify the ProductLineConfigManagerTest
modify the ProductLineConfigManagerTest
MetricConfigManagerTest
modify the testcase
modify the cat testcase
add the testcase
modify the mocklog
fix compile error