Project: springxd
Issue XD-404: Update documentation section "Running in Distributed Mode" to show use of RabbitMQ in addition to Redis
The documentation in the Running in Distributed Mode chapter should discuss that the distributed runtime can use essentially any middleware to communicate between nodes. This functionality is provided by the core ChannelRegistry abstraction. A new intro paragraph shoul convey that it isn't a 'redis' only or 'rabbitmq' only system. There should be "Installing RabbitMQ" and "Starting RabbitMQ" sections to match those for Redis. "Starting Spring XD in Distributed Mode" should cover how to configure the system to select to use Redis or Rabbit.
Story points: 3