redis template can advertise via consul

consul release's job template looks in /var/vcap/jobs/*/consul/*.json
for service configuration.

A three node service (warden example) will advertise itself like:

    $ dig @127.0.0.1 -p 8600 redis.service.consul +short
    10.244.2.14
    10.244.2.10
    10.244.2.6

    $ dig @127.0.0.1 -p 8600 master.redis.service.consul +short
    10.244.2.6
    $ dig @127.0.0.1 -p 8600 slave.redis.service.consul +short
    10.244.2.14
    10.244.2.10