conf: db logging enable
new feature: SignUp, pending to use and account locking

- new to hive sign-up user, pending to user until site admin confirm.
- site admin can lock user account at sites/settings menu
if you want to use sign-up confirm, uncomment below property in application.conf
#signup.require.confirm = true

see, HIVE-138
fix: broken tests
Merge pull request #25 from doortts/HIVE-138

사용자 계정 잠금 기능