message: [cli] fixed sequence number for blocking call to add_currency
  Closes:
  Approved by: sblackshear
diff: @@ -422,7 +422,7 @@ impl ClientProxy {
  self.client
  .submit_transaction(self.accounts.get_mut(sender_ref_id), txn)?;
  if is_blocking {
  - self.wait_for_transaction(sender_address, sequence_number)?;
  + self.wait_for_transaction(sender_address, sequence_number + 1)?;
  }
  Ok(())
  }
  