Add notifier logrotate

[rverchere]

Please add logrotate for notifier, which is not enabled by default:

# cat /etc/logrotate.d/notifier
/srv/eyesofnetwork/notifier/log/notifier_send.log
/srv/eyesofnetwork/notifier/log/notifier_rules.log
/srv/eyesofnetwork/notifier/log/notifier.log {
    su nagios eyesofnetwork
    missingok
    monthly
    notifempty
    compress
    create 0664 nagios eyesofnetwork
}