[fix][txn] Fix TransactionTest failure due to clean up after class

[liangyepianzhou]

Motivation

Fix testGetTxnID, testSubscriptionRecreateTopic and testPendingAckMarkDeletePosition can not pass since the broker is not cleaned up.

Modification

fix the testGetTxnID, and move the testSubscriptionRecreateTopic and testPendingAckMarkDeletePosition to adapt AfterClass in TransactionTest.

Verifying this change

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(Please pick either of the following options)

This change is a trivial rework / code cleanup without any test coverage.

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Does this pull request potentially affect one of the following parts:

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• [ ] Dependencies (add or upgrade a dependency)
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• [ ] The binary protocol
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• [ ] Anything that affects deployment

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Matching PR in forked repository

PR in forked repository: https://github.com/liangyepianzhou/pulsar/pull/3

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