test/cql-pytest: test that SSL CQL port doesn't accept unencrypted connections
test/cql-pytest: test that SSL CQL port doesn't accept unencrypted connections

Scylla doesn't allow unencrypted connections over encrypted CQL ports
(Cassandra does allow this, by setting "optional: true", but it's not
secure and not recommended). Here we add a test that in indeed, we can't
connect to an SSL port using an unencrypted connection.

The test passes on Scylla, and also on Cassandra (run it on Cassandra
with "test/cql-pytest/run-cassandra --ssl" - for which we added support
in a recent patch).

Signed-off-by: Nadav Har'El <625169824b719df98706d88646d0aae6f368ae4d@scylladb.com>
Message-Id: <20210629121514.541042-1-625169824b719df98706d88646d0aae6f368ae4d@scylladb.com>

scylladb/scylla,scylladb/scylla,scylladb/scylla,scylladb/scylla