Tagging Hummingbird RC2 (1.7.0-rc2)

1. 338bc0c Bumping pom versions to 1.7.0-rc2 and fixing some maven issues by Brian O'Connor · 8 years ago 1.7.0-rc2
2. cb4a3db Made changes as per comments. kafkaProducer is now non-static. by Sanjana Agarwal · 8 years ago
3. 1e8471e Intial Stub code for the Cluster features in Kafka Application.(patchset #4) by Shravan Ambati · 8 years ago
4. 32770ad Bug Fixes for Kafka Application(patchset #2) by Shravan Ambati · 8 years ago
5. eb9f0c5 Kafka Codec Integration by Sanjana Agarwal · 8 years ago
6. 1b2aea8 Removing gratuitous relativePath from pom.xmls by Brian O'Connor · 8 years ago
7. bb6b445 Kafka Integration Application (Fix Javadoc errors + review comments) by Shravan Ambati · 8 years ago