KAFKA-12561: don't set timeout for future.get

[showuon]

These tests failed quite often, because of TimeoutException. We cannot get the future result in time. I think the flaky tests tell us that we should not expect the results will return as soon as we expected in jenkins. Like other tests, we don't usually set timeout when future.get, so remove the timeout setting to make this test reliable.

Committer Checklist (excluded from commit message)

• Verify design and implementation
• Verify test coverage and CI build status
• Verify documentation (including upgrade notes)

[showuon]

@mumrah , @hachikuji , could you review this PR? It failed a lot in recent builds. Thanks.

[chia7712]

@showuon thanks for this quick fix. This patch makes sense to me. This class has a global timeout so removing the local timeout should be fine.

+1

[showuon]

@mumrah , @hachikuji , could you review this PR? It keeps failing recent builds. Thanks.

[chia7712]

@showuon Could you merge trunk to trigger QA again? I'd like to merge it if QA pass :)

[showuon]

@chia7712 , merged the trunk and tests triggered. Let's see :)

[chia7712]

kafka.server.ListOffsetsRequestTest.testResponseIncludesLeaderEpoch() is traced by #10389 and ConnectionQuotasTest.testListenerConnectionRateLimitWhenActualRateAboveLimit is unrelated flaky. will merge to trunk

[chia7712]

@showuon thanks for this fix!