KAFKA-3258: Delete broker topic metrics of deleted topics.

KAFKA-3393: Updated the docs to reflect the deprecation of block.on.buffer.full and usage of max.block.ms.

KAFKA-3660: Log exception message in ControllerBrokerRequestBatch.

KAFKA-3683: Add file descriptor recommendation to ops guide.

KAFKA-3704: Revert "Remove hard-coded block size in KafkaProducer."

KAFKA-3717: Support building aggregate javadoc for all project modules.

KAFKA-3718: Propagate all KafkaConfig __consumer_offsets configs to OffsetConfig instantiation.

KAFKA-3721: Put UpdateMetadataRequest V2 in 0.10.0-IV1.

KAFKA-3728: EndToEndAuthorizationTest offsets_topic misconfigured.

KAFKA-3747: Close `RecordBatch.records` when append to batch fails.

KAFKA-3784: TimeWindows#windowsFor calculation is incorrect.

KAFKA-3785: Fetcher spending unnecessary time during metrics recording.

KAFKA-3787: Preserve the message timestamp in mirror maker.

KAFKA-3789: Upgrade Snappy to fix snappy decompression errors.