Free Form Message Schema Updates

[moshthepitt]

Change the free form message schema to include a metadata object with more information on the target as follows:

For user targets:

{
    "payload": {
        "message": "I love oov",
        "context": {
            "type": "user",
            "metadata": {
                "id": 1337,
                "name": "John Doe",    
            }
        },
        "author": {
            "username": "Bob",
            "real_name": "Bob Smith"
        }
    },
    "id": 3,
    "time": "2018-03-27T08:14:51.136675+00:00"
}

For project targets:

{
    "payload": {
        "message": "I love oov",
        "context": {
            "type": "project",
            "metadata": {
                "id": 1337,
                "name": "The Project Name", 
            }
        },
        "author": {
            "username": "Bob",
            "real_name": "Bob Smith"
        }
    },
    "id": 3,
    "time": "2018-03-27T08:14:51.136675+00:00"
}

For xform targets:

{
    "payload": {
        "message": "I love oov",
        "context": {
            "type": "xform",
            "metadata": {
                "id": 1337,
                "name": "The Form Title",
                "form_id": "The_ID_String"    
            }
        },
        "author": {
            "username": "Bob",
            "real_name": "Bob Smith"
        }
    },
    "id": 3,
    "time": "2018-03-27T08:14:51.136675+00:00"
}

Aha! Link: https://ona.aha.io/features/PROD-388