message: Metric alerts- WebtestLocationAvailabilityCriteria should inherit from MetricAlertCriteria
diff: "WebtestLocationAvailabilityCriteria": {
  "x-ms-discriminator-value": "Microsoft.Azure.Monitor.WebtestLocationAvailabilityCriteria",
  "type": "object",
  + "allOf": [
  + {
  + "$ref": "#/definitions/MetricAlertCriteria"
  + }
  + ],
  "properties": {
  "webTestId": {
  "type": "string",
  