CRUNCH-243, I wanted to support injecting custom readers to handle the cases like passivity between Avro Schema. The changes made however were not complete as we also need to be able to inject a reader into the AvroRecordReader which constructs its own SpecificDatumReader.
We could create a SpecificDataFactory which emulates the ReflectDataFactory. Or simplify to a single DataFactory which will create either Reflect/Specific/Generic. Thoughts?