• Breaking change? (if so, please describe the impact and migration path for existing applications:)

What changes did you make? (Give an overview)
Now we can get a valid list of topics that are used by a connector.
If the connector type is SOURCE, then the list is where it sends messages,
If the connector type is SINK, where it consumes from.

After
The connectors are set up to deal with multiple topics. Some of them use regexs or topic, topics properties

Is there anything you'd like reviewers to focus on?

How Has This Been Tested? (put an "X" next to an item)

• No need to
• Manually(please, describe, when necessary)
• Unit checks
• Integration checks
• Covered by existing automation

Checklist (put an "X" next to an item, otherwise PR will fail)

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation (e.g. ENVIRONMENT VARIABLES)
• My changes generate no new warnings(e.g. Sonar is happy)
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged

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