XX-11382: improve SEC / Alarm service performance

- log sipxbridge, sipxivr and sipxrelay alarms in separate files (-alarms.log): new "alarms" logger configured in log4j property to be used for alarms
- confiugred logrotate for new logs, added logrotate for backup.log
- instruct sec to use only files that could contain alarms (and removed /var/log/messages)
- make sure sipxlogwatcher-rc is written only once
- prevent logwatcher reload when .sec files are not changed despite replication