Telegraf-based keepalived state metrics

- enabled keepalived input for telegraf
- disabled fluentd config
- added new process alert for keepalived_up
- added new process state alert for UNKNOWN state
- improved process status panels by using keepalived_up
- added responsiveness panel

Change-Id: I0ff7d6f8527a98cb909aa896b51077704386ce35
Related-bug: PROD-23880 (PROD:23880)
6 files changed