KAFKA-872; Socket server should set send/recv socket buffer sizes; reviewed by Jun Rao.
kafka-871; Rename ZkConfig properties; patched by Swapnil Ghike; reviewed by Jun Rao
kafka-880; NoLeaderPartitionSet should be cleared before leader finder thread is started up; patched by Jun Rao; reviewed by Neha Narkhede
Trivial commit - warn on consumer fetch request errors.
change to standardize on [%s,%d] for partition
KAFKA-887 Standardize logging for partition information to [%s,%d] format; reviewed by Swapnil and Jun
KAFKA-890 The list of brokers for fetching metadata should be shuffled; reviewed by Joel Koshy
KAFKA-889 Add mbeans to track socket server's response queue size in addition to request queue size; reviewed by Jun Rao and Joel Koshy
KAFKA-892 Change request log to include request completion not handling; reviewed by Joel Koshy