[issue 3954] [flink] Use (client/consumer/producer) pojo to pass config to pulsar client

[shiv4289]

Motivation

pulsar-flink client lags behind pulsar-client in the number of configuration options. Write pulsar-flink in a way that does not warrant changing pulsar-flink every time a new config is introduced.

Modifications

In this patch, we provide handles for flink connecotr to accept ClientConfigurationData, ProducerConfigurationData, ConsumerConfigurationData so flink client can:

1. accept all params of client, producer and consumer
2. Keep pace with pulsar-client

Verifying this change

This change added tests and can be verified as follows:

• Added test cases for the new code

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

If yes was chosen, please highlight the changes

• Dependencies (does it add or upgrade a dependency): (yes)
• The public API: (yes)
• The schema: (no)
• The default values of configurations: (no)
• The wire protocol: (no)
• The rest endpoints: (no)
• The admin cli options: (no)
• Anything that affects deployment: (yes)

Documentation

• Does this pull request introduce a new feature? ( no)
• If yes, how is the feature documented? (not applicable)
• If a feature is not applicable for documentation, explain why? (Internal refactoring)
• If a feature is not documented yet in this PR, please create a followup issue for adding the documentation

[merlimat]

👍

[shiv4289]

run java8 tests