Ensure that logstash is running

Add "ensure => running" and associated configuration for logstash
service. Also change the syslog listening port to be >1024 so that it
can be bound by the non-root user that is running logstash daemon.

Change-Id: I70113919be68274b132d1c965f64e2ae75444f0f
Merge "Ensure that logstash is running" into production