KAFKA-9541:Flaky Test DescribeConsumerGroupTest#testDescribeGroupMembersWithShortInitializationTimeout

[huxihx]

https://issues.apache.org/jira/browse/KAFKA-9541

Occasionally the captured exception is DisconnectedException instead of TimeoutException. That might be due to an unexpected long pause that caused the node disconnection.

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[huxihx]

@hachikuji Please review the patch. Thanks.

[abbccdda]

Could we catch the disconnected exception and retry for timeout exception, so that the test could fail on timeout eventually?

[hachikuji]

Thanks for the PR. We fixed this with a different approach here: 2df7ea5. Basically we changed KafkaAdminClient so that it raises TimeoutException consistently. I will go ahead and close this. Please reopen if this was a mistake.