Start script to get Kafka broker addresses does not work in 1.12

[ericgoode]

Using DC/OS 1.12 the script "export TWEET_CONSUMER_KAFKA_BROKERS=curl -s master.mesos:8123/v1/services/_broker-0._tcp.kafka.mesos | python -c 'import sys, json; j = json.load(sys.stdin); print(j[0]["ip"] + ":" + j[0]["port"])'" does not return any result. My work around was to place the following environment variable for each of the apps.

TWEET_CONSUMER_KAFKA_BROKERS=kafka-0-broker.kafka.autoip.dcos.thisdcos.directory:1025,kafka-1-broker.kafka.autoip.dcos.thisdcos.directory:1025,kafka-2-broker.kafka.autoip.dcos.thisdcos.directory:1025

And

TWEET_PRODUCER_KAFKA_BROKERS=kafka-0-broker.kafka.autoip.dcos.thisdcos.directory:1025,kafka-1-broker.kafka.autoip.dcos.thisdcos.directory:1025,kafka-2-broker.kafka.autoip.dcos.thisdcos.directory:1025