Disable materialized views and transient replication.
Disable materialized views and transient replication.

They are marked as experimental in the Cassandra docs (see
https://cassandra.apache.org/doc/latest/configuration/cassandra_config_file.html#enable-materialized-views)
and it is recommended to disable them in production settings. In the
default configuration, they appear to be on for some reason, so let's
disable them manually to be safe.

Fixes #2.

tonnerre/dockerfiles,tonnerre/dockerfiles