BB-67 add ADVERTISED_HOST/ADVERTISED_PORT env to kafka container
BB-67 add ADVERTISED_HOST/ADVERTISED_PORT env to kafka container

This is required to advertise the proper hostname ("localhost") to the
kafka producer/consumer, without it producers are not able to receive
the delivery reports properly as the default hostname is not
reachable.

scality/backbeat,scality/backbeat,scality/backbeat,scality/backbeat