KAFKA-9901:Fix streams_broker_bounce_test error

[jiameixie]

The constructor of StreamsSmokeTestJobRunnerService has been changed.
But it's not updated in streams_broker_bounce_test.py, which makes
num_threads = 3 to be processing_guarantee's value and causes that
StreamsTest can't startup

Change-Id: I07ebc3e007e0ddd0b5182d5cf9467cdfac993eae
Signed-off-by: Jiamei Xie jiamei.xie@arm.com

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[jiameixie]

@guozhangwang @ijuma @junrao PTAL, thanks

[cadonna]

In order to avoid duplicate work, I just want to let you know that I also have a PR that fixes this issue the same way #8532. I have already run the system tests on that PR to verify the fix. On my PR, there is also a discussion on which value to set the new constructor parameter. You can merge this or the other PR, I do not care. I just wanted to let you know.

[cadonna]

@jiameixie My PR was merged.