API 2.9: Change request regarding meta.collect object

[JuAlMan]

Using image docker.sunet.se/dc4eu/apigw:apiv28

First there seems to be a mismatch between API spec and implementation, as leaving out the collect object completely (which should be possible as it is optional) yields the following result:

{
    "data": null,
    "error": {
        "title": "internal_server_error",
        "details": null
    }
}

It only works when using an empty object.

To be discussed:
We propose that you should either leave out the collect object completely or - when submitting the object - use both parameters id and valid_until. So the whole collect object should be optional but the attributes of the collect objects itself should both be required.
We also changed this in the API v29 spec.