Avro(Consumer|Producer) don't support logger parameter

[venthur]

Description

According to the Docs there is a logger parameter that can be passed to Consumer or Producer. But the Avro-counterparts are not supporting it.

How to reproduce

Just try:

>>> kc = confluent_kafka.avro.AvroConsumer(
    {'schema.registry.url': 'http://example.com',
     'group.id': 'test',
     'debug': 'all'},
    logger=logger)

Checklist

Please provide the following information:

• confluent-kafka-python and librdkafka version (confluent_kafka.version() and confluent_kafka.libversion()): ('1.2.0', 16908288), ('1.2.1', 16908799)
• Apache Kafka broker version:
• Client configuration: {...}
• Operating system: Debian/Linux
• Provide client logs (with 'debug': '..' as necessary)
• Provide broker log excerpts
• Critical issue

[slepkin]

This is an issue for us, too. Thanks for opening a PR!

[chrisjbremner]

For anyone who comes across this, see the workaround suggested in #657 (comment). Also note that #699 is created.