KAFKA-1199 Add a reduced access log level; reviewed by Guozhang Wang and Jun Rao
KAFKA-1200 inconsistent log levels when consumed offset is reset patch by Dima Pekar reviewed by Joe Stein
kafka-1202; optimize ZK access in KafkaController; also incorporating fixes in kafka-1020; patched by Jun Rao and Guozhang Wang; reviewed by Neha Narkhede and Joel Koshy
kafka-1208; Update system test still to use kafka-topics instead of kafka-create-topics shell; patched by Guozhang Wang; reviewed by Jun Rao