:closed_lock_with_key: Enable secured connection from Kafka Connect

[rmarting]

This PR extends #63 alllowing secured connections from kafka connect to Kafka broker under the following authentication use cases.

• SSL without authentication
• SSL with authentication (PLAIN, SCRAM)

[Neustradamus]

@rmarting: Good job about SCRAM!

Linked to:

• https://github.com/scram-sasl/info/issues/1
• https://github.com/ansible-middleware/amq_streams/issues/63
• https://github.com/ansible-middleware/amq_streams/pull/70
• https://github.com/ansible-middleware/amq_streams/pull/73
• https://github.com/ansible-middleware/amq_streams/pull/74
• https://github.com/ansible-middleware/amq_streams/pull/76