Ensure routing key is specified in the address for a direct producer

This then matches the address used a direct consumer.

Change-Id: If71f78e50f8a9b3acfd1e9d02c8271f17c4ebee7
Closes-Bug: #1300318
(cherry picked from commit 9e0e85ede8406ace45c7573b18b8fe86c3e58921)