Comment 2 for bug 1405183

At the time of publication, RabbitMQ didn't require additional configuration to enable the "guest" account except on SUSE variants. The installation guide for Kilo will create a "real" user in RabbitMQ. However, due to an increase in bugs from people either attempting to use the installation guide with an unsupported distribution version (e.g., Ubuntu 14.10) or manually installing upstream RabbitMQ packages, I think we need to implement a temporary workaround in the installation guide for Juno.