Retention Date Add 값 Minus 로 변경 
graph.js 에서 debug 코드 제거
Merge branch 'master' of https://github.com/wishoping/l2bq-sample.git

Conflicts:
	src/main/webapp/dashboard/js/graph.js
Merge branch 'master' of https://github.com/wishoping/l2bq-sample

Conflicts:
	src/main/webapp/dashboard/js/graph.js