Changes to Find similar images

added the non-success response with the status 409

added the new optional query request parameter includeSourceDataset

added the non-success response with the status 503

added the required property images/items/hash to the response with the 200 status

added the required property images/items/height to the response with the 200 status

added the required property images/items/name to the response with the 200 status

added the required property images/items/width to the response with the 200 status

endpoint added