@Override public BytesWritable getWritable(byte[] value) {
      return new BytesWritable(value);
    }
Avro converter which skips the first @skipBytes of each message.

This may be needed for various serializers, such as the Confluent Avro serializer, which uses the first five
bytes to indicate a magic byte, as well as a four byte schema ID.
kafka-handler/src/java/org/apache/hadoop/hive/kafka/KafkaSerDe.java