Cannot Unit test producer that takes confluent_kafka.Producer as dependency

[dineshkumare5]

Description

confluent_kafka.Producer class has Owner. This is making any class that takes a dependency on Producer not testable.

How to reproduce

Create a class that takes dependency on Producer object. The Producer object cannot be mocked.

Checklist

Please provide the following information:

• [x] confluent-kafka-python and librdkafka version (confluent_kafka.version() and confluent_kafka.libversion()):
• [ ] Apache Kafka broker version:
• [ ] Client configuration: {...}
• [ ] Operating system:
• [ ] Provide client logs (with 'debug': '..' as necessary)
• [ ] Provide broker log excerpts
• [ ] Critical issue