KAFKA-10070: parameterize Connect unit tests to remove code duplication

[levzem]

Signed-off-by: Lev Zemlyanov lev@confluent.io

Parameterize Connect unit tests to remove code duplication. Some PRs added duplicate test classes to test topic creation. This fix parameterizes the topic creation to reduce code duplication.

The topic creation tests were copied over to the original test classes to capture any changes to reduce risk of test coverage.

Committer Checklist (excluded from commit message)

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

[levzem]

@C0urante @kkonstantine @rhauch would appreciate some 👀 , thanks!

[mimaison]

Thanks for the PR. That's a pretty nice cleanup!
I've only taken a quick look so far but there are a few small formatting issues that are failing checkstyle

[levzem]

tests failing are unrelated to the changes

Build / JDK 11 / kafka.api.PlaintextConsumerTest.testAutoCommitOnCloseAfterWakeup()
Build / JDK 15 / org.apache.kafka.connect.integration.RebalanceSourceConnectorsIntegrationTest.testMultipleWorkersRejoining

@mimaison thanks for the review, mind taking another pass?

[kkonstantine]

Thanks @levzem
Glad to see there's a workaround to make parameterized tests work with powermock.

LGTM, but I'll wait for @mimaison's final approval.