Bind redis-sentinel to its network
Bind redis-sentinel to its network

We currently do not bind redis-sentinel to any IP:
redis      21144  0.0  0.0 142908  5908 ?        Ssl  07:43   0:11 /usr/bin/redis-sentinel *:26379 [sentinel]

Let's bind it to the same network as redis.

Change-Id: I8a782ae1db84eb614aa3995a1638a2f370e70d06
Partial-Bug: #1673715

openstack/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,dprince/tripleo-heat-templates