Add a new field: availability

[psaiz]

Add a new optional field to the records that would identify the status of the dataset. Possible status are:

• Available
• Sample available
• Needs to be requested

[tiborsimko]

We already have a distribution.availability field that is meant to be used precisely for this purpose?

    "distribution": {
      "properties": {
        "availability": {
          "description": "Specifies if dataset is on-demand, online in future might be also tape, disk",
          "enum": [
            "ondemand",
            "online"
          ],
          "type": "string"
        },

[psaiz]

Even better, thanks! Then, to complete this ticket it looks like the only change will be to add new entries to the enum