Updated Cassandra-Unit, DSE Driver and Cassandra version to latest stable version. Changed the Test Cases to support the API changes on the driver by DataStax. They changed the exception hierarchy for failed
replication factor quorum. The embedded spring-cassandra.yaml files were tuned to turn of unneeded features that were causing overhead in the testing. Marked new test dependencies as test scope.
Original pull request: #43.
237ac88bc5