Enchancement - Marathon content

[mbettan]

Hello,

Marathon operations (like send_create_app_req) required a body parameter passed (json format like sample-marathon-app.json).

It would be much better for CloudSlang users to create this body on the fly an take inputs in parameters like id, cpu, mem, instances, ... Otherwise, the only value provided is the URL pre-created for the CloudSlang users and there is no value from this operation compared to directly using rest api operation.

Here an example

operation:
  name: send_create_app_req
  inputs:
    - marathon_host
    - marathon_port:
        default: "'8080'"
        required: false
    - body
    - url:
        default: "'http://'+ marathon_host + ':' + marathon_port +'/v2/apps'"
        overridable: false

Instead of pass-through body, we should take inputs and build this body inside the operation, but more valuable for CloudSlang users.

Best Regards,
Michaël B.