MINOR: adjust logging levels in Stream tests (#12255)
MINOR: adjust logging levels in Stream tests (#12255)

Now that we've turned off logging in the brokers/zookeeper/config classes we can finally see at least some of the logs where Streams is actually doing something when trying to debug tests from a failed PR build. But I've noticed we still have some flooding of warnings from the NetworkClient and info-level junk from Metadata, so to maximize the visible useful logs we should filter out everything bu the producer/consumer client themselves (in addition to Streams) fine-grained logging

Reviewers: Luke Chen <a747209bc9e65a9d7dd7589245c91b7bed721b13@gmail.com>, Kvicii Y
lindong28/kafka,guozhangwang/kafka,lindong28/kafka,apache/kafka,lindong28/kafka,apache/kafka,lindong28/kafka,guozhangwang/kafka,guozhangwang/kafka,guozhangwang/kafka,apache/kafka,apache/kafka