Support for dockerized Cassandra

[vejeta]

It would be nice to have dockerized cassandra instances instead of the Java embedded Cassandra for the integration tests.

• Pros: Using the same Cassandra versions that in production environments.
• Cons: Possibly speed, bandwidth usage

Other information:

This idea is inspired in other approaches to do Integration Tests:

• https://github.com/whisklabs/docker-it-scala

docker-it-scala can work with two underlying libraries to communicate to docker engine through REST API or unix socket.

• Spotify's docker-client (used in Whisk): https://github.com/spotify/docker-client
• docker-java: https://github.com/docker-java/docker-java