[VOTE] KIP-499 - Unify connection name flag for command line tool

[Mitchell]

Hello Dev,
After the discussion I would like to start the vote for KIP-499


The following command line tools will have the `--bootstrap-server`
command line argument added: kafka-console-producer.sh,
kafka-consumer-groups.sh, kafka-consumer-perf-test.sh,
kafka-verifiable-consumer.sh, kafka-verifiable-producer.sh

Thanks,
-Mitch