message: adding new properties
diff: "type": "string",
  "readOnly": true
  },
  + "initialPrimaryZone": {
  + "description": "The initial primary availability zone.",
  + "type": "string",
  + "readOnly": true
  + },
  + "initialRecoveryZone": {
  + "description": "The initial recovery availability zone.",
  + "type": "string",
  + "readOnly": true
  + },
  "multiVmGroupId": {
  "description": "The multi vm group Id.",
  "type": "string"
  "type": "string"
  }
  },
  - "x-ms-discriminator-value": "RecoveryPlanA2ADetails"
  + "x-ms-discriminator-value": "A2A"
  },
  "RecoveryPlanA2AInput": {
  "description": "Recovery plan A2A input.",
  