allow broker-list to show all running kafka brokers
allow broker-list to show all running kafka brokers

tagia0212/kafka-docker,blademainer/kafka-docker,varju/kafka-docker,wurstmeister/kafka-docker,coffenbacher/kafka-docker,jdavisonc/kafka-docker,Banno/kafka-docker,cyberphysical/kafka-docker,scrapinghub/kafka-docker,saleswise/kafka-docker,mzemel/kafka-docker,b0c1/kafka-docker,cloudbearings/kafka-docker,nwkeeley/kafka-docker,juanantoniofm/kafka-dockerized-cluster,DockerKafka/kafka-docker,SUMGlobal/rpi-kafka,openshine/docker-kafka,geoand/kafka-docker