message: fix(wallet-platform): whitelist messageKey param
  TICKET:
diff: @@ -491,7 +491,7 @@ export class Wallet {
  'feeRate', 'gasLimit', 'gasPrice', 'idfSignedTimestamp', 'idfUserId', 'idfVersion', 'instant',
  'lastLedgerSequence', 'ledgerSequenceDelta', 'maxFee', 'maxFeeRate', 'maxValue', 'memo', 'message', 'minConfirms',
  'minValue', 'noSplitChange', 'numBlocks', 'recipients', 'reservation', 'sequenceId', 'strategy',
  - 'targetWalletUnspents', 'trustlines', 'type', 'unspents', 'validFromBlock', 'validToBlock',
  + 'targetWalletUnspents', 'trustlines', 'type', 'unspents', 'validFromBlock', 'validToBlock', 'messageKey',
  ];
  }
  