Add namespace to 'url' attribute in response when resource has been created

[KIVagant]

For example, when I trying to create new image in the '/fractal/' namespace:

http --verify no --auth Developer:123456 -f POST https://localhost/staticus/fractal/fractal.jpg recreate=1
HTTP/1.1 201 Created
...
{
    "resource": {
        "body": "",
        "dimension": "0",
        "height": 0,
        "name": "fractal",
        "nameAlternative": "",
        "namespace": "fractal",
        "new": true,
        "recreate": false,
        "type": "jpg",
        "uuid": "28890c0b3a775ebd22755c0a1a35b9f4",
        "variant": "def",
        "version": 0,
        "width": 0
    },
    "uri": "fractal.jpg"                  # ← here MUST be namespace in URI like /fractal/fractal.jpg
}

All clients now need to concatenate "namespace" and "uri" parameters to get correct uri.