message: Add encryption in DiskUpdateProperties and SnapshotUpdateProperties
diff: "type": "integer",
  "format": "int32",
  "description": "The bandwidth allowed for this disk; only settable for UltraSSD disks. MBps means millions of bytes per second - MB here uses the ISO notation, of powers of 10."
  + },
  + "encryption": {
  + "$ref": "#/definitions/Encryption",
  + "description": "Encryption property can be used to encrypt data at rest with customer managed keys or platform managed keys."
  }
  },
  "description": "Disk resource update properties."
  "encryptionSettingsCollection": {
  "$ref": "#/definitions/EncryptionSettingsCollection",
  "description": "Encryption settings collection used be Azure Disk Encryption, can contain multiple encryption settings per disk or snapshot."
  + },
  + "encryption": {
  + "$ref": "#/definitions/Encryption",
  + "description": "Encryption property can be used to encrypt data at rest with customer managed keys or platform managed keys."
  }
  },
  "description": "Snapshot resource update properties."
  