1094256 - Updated the consumer binding docs to make it clear a 200 can be returned

https://bugzilla.redhat.com/show_bug.cgi?id=1094256
When notify_agent is false, the task occurs synchronously, so it returns a 200. If notify_agent is true, it spawns a task to notify the agent that the binding is being deleted and returns a 202. It waits for the consumer to acknowlege that the binding is being removed before deleting it server side.