Upgraded PMD version to 6.6.0
Upgraded PMD version to 6.6.0

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