Upgraded checkstyle plugin to 3.0.0
Upgraded checkstyle plugin to 3.0.0

lgoldstein/mina-sshd,lgoldstein/mina-sshd,apache/mina-sshd,apache/mina-sshd,apache/mina-sshd,lgoldstein/mina-sshd,lgoldstein/mina-sshd,apache/mina-sshd