Remove the RabbitMQ guest user on the dev VM.
Remove the RabbitMQ guest user on the dev VM.

This user isn't present in production, and its presence on the dev VM is
only causing confusion. It's better to have dev-prod-parity by not
having this present so that permissions issues will be found before
deploying things to preview.

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet