Apache Kafka 0.9.0 Upgrade

Some critical bugs were fixed as part of Apache Kafka 0.9.0 release. There are some good reasons to upgrade to v0.9.0.0 of Apache Kafka.

Some of the notable bug fixes are:

http://issues.apache.org/jira/browse/KAFKA-2114

http://issues.apache.org/jira/browse/KAFKA-2096

http://issues.apache.org/jira/browse/KAFKA-1282

http://issues.apache.org/jira/browse/KAFKA-2147