Remove unused node dependency in Cassandra plugin
Fix logging for Hive connectors

Logback was being erroneously included in the plugin zip file by the
Maven assembly plugin. This caused SLF4J or bridged logging to go
into logback and be logged to stdout.
Fix bad import of internal jmxutils class
Update to airlift 0.91 and airbase 22
Update JVM config in deployment instructions

Updated the deployment documentation JVM config instructions to reflect
the Java 8 differences (floatingdecimal patch and PermSize parameters).
Add release notes for 0.71
[maven-release-plugin] prepare release 0.71
[maven-release-plugin] prepare for next development iteration