Repro steps

1. Create a node.js project with the new programming model
2. Add an http function
3. Run the project
4. List the functions in workspace view (with Nathan's fix Node v4 model should list local functions #3513)
5. Execute the http function with body Eric or empty body (Just not { "name": "Eric" } which is how we did it in the old model)

Expected

Response should be Hello, Eric! or Hello, World!

Actual

Response is Hello, "Eric"! or Hello, ""!

More info

I think this is actually related to #3003 cc @motm32. I did some digging and turns out sendRequestWithExtTimeout will automatically JSON serialize the body unless you set disableJsonStringifyOnBody to true. And if you JSON serialize a string, it apparently just adds quotes for some reason. I believe this extra JSON serialization is the root of all problems and I hope if you add disableJsonStringifyOnBody you can greatly simplify the serialization/parsing/etc. for http & service bus triggers.