sherlock-lin

[ISSUE #6844] Optimize registerProducer design

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### Which Issue(s) This PR Fixes Fixes #6844 ### Brief Description I try optimize ProducerManager registerProducer design and I think the previous code was redundant ### How Did You Test...

Current Pulsar Manager Unsupport Decommission Bookie，We want to be able to have that.

test: migrate client module api tests to junit 5

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Descriptions of the changes in this PR: Fix #4322 Main Issue: #4322

[Test] migrate-junit5-client-module and parameterized beforeEach

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Main Issue: #4322 ### 1. why parameterized beforeEach Because the current version of Junit 5 does not support class-level parameterized， [related links](https://github.com/junit-team/junit5/issues/878)，We can achieve the same effect by beforeEach。 ###...

Clean up Junit4 annotations such as @Before, @After after migrating to JUnit5