Adapted from https://github.com/zmarcantel/docker-cassandra to install CQLSH the Python based Cassandra CLI
Documented at https://simbo1905.wordpress.com/2017/02/24/cassandra-for-shared-media-libraries/
docker run -d --name "cass0" zmarcantel/cassandra
docker run -d --name cass1 --link cass0:cass0 zmarcantel/cassandra
docker run -d --name cass2 --link cass0:cass0 --link cass1:cass1 zmarcantel/cassandra