Projects which may use Kafka include Monasca and Oslo
messaging. Initially it will be possible to
deploy a single Kafka cluster which may be shared
among clients. Support for running multiple Kafka
clusters may be added in a future change. This
change also configures logging for Kafka server,
state-change and controller logs.

Partially-Implements: blueprint monasca-roles
Change-Id: Iab8d200c2450238f3c0c708d1f4184490f6e6284