Add command to reopen logs with SIGUSR1 signal. Improve reload command

- The reopen logs signal can be used by something like logrotate during
  log rotation.
- Disable duplicate logging from elasticsearch. The console and file
  logging were identical. Use the console one, since it's easier to
  rotate with the supervisor reopen signal.
- Fix the reload command, so it only attempts to reload the services
  that are enabled on the current server.