Publish observations as REC observations

[baardl]

See https://github.com/RealEstateCore/rec/blob/main/API/Edge/edge_message_edge-to-cloud_example.json

{
  "format": "rec3.3",
  "deviceId": "https://recref.com/device/64b65a99-a53c-47f5-b959-1c7a641d82d8",
  "observations": [
    {
      "observationTime": "2019-05-27T20:07:44Z",
      "value": 16.1,
      "quantityKind": "https://w3id.org/rec/core/Temperature",
      "sensorId" : "https://recref.com/sensor/e0d5120b-90f1-48d6-a47f-f8ccd7727b04"
.....additional ObservationMessage data...
    }
  ],

Then challenge is how to align this with IoT Hub Telemetry Message

Will be implemented in https://github.com/Cantara/realestate-azure-client-lib/blob/main/src/main/java/no/cantara/realestate/azure/AzureObservationDistributionClient.java - publish method