Add test for adding, updating, and deleting column_families.
Add test for adding, updating, and deleting column_families.

rightscale/cassandra,stipple/cassandra_new,cassandra-rb/cassandra,rightscale/cassandra,rightscale/cassandra,stipple/cassandra_new,stipple/cassandra_new,cassandra-rb/cassandra,stipple/cassandra_new,cassandra-rb/cassandra,cassandra-rb/cassandra