Merge branch 'release/2.0.0-RC1' into develop
updating poms for 2.0.0-SNAPSHOT development
Add zookeeper configurator
Bump cassandra driver to 2.1.2
Give priority to config.json -> env vars -> zookeeper
updating poms for branch'release/2.0.0' with non-snapshot versions
Merge branch 'release/2.0.0'