cleanup of module001-ch008-queues-messaging

changed to marshaling to stick to convention in above sentence
corrected run on sentence
capitalized after new para
RabbitMQ is "a" function - added "a"
the hostname, the added
added the before sake
Consumers changed to consumers

Change-Id: I87858d666b201d1bbc24c9fcf17507fc897432fb
Merge "cleanup of module001-ch008-queues-messaging"