Set Kafka Broker advertisement hostname
Set Kafka Broker advertisement hostname

Default settings only allow localhost advertisement by kafka broker.
with this update kafka broker will advertise devstack configured ip address.

Change-Id: Ie3a146598789d6f63bbf55c4847cc569231c9dec

stackforge/monasca-api,openstack/monasca-api,openstack/monasca-api,openstack/monasca-api,stackforge/monasca-api,stackforge/monasca-api,stackforge/monasca-api