message: fix u64 type test data in account json
  Closes:
diff: @@ -306,7 +306,7 @@ mod tests {
  "id": id,
  "jsonrpc": "2.0",
  "libra_chain_id": chain_id,
  - "libra_ledger_timestampusec": 1599587372,
  + "libra_ledger_timestampusec": 1599670083580598u64,
  "libra_ledger_version": 2052770,
  "result": result
  })
  @@ -341,7 +341,7 @@ mod tests {
  serde_json::json!({
  "human_name": "No. 0",
  "base_url": "",
  - "expiration_time": 18446744,
  + "expiration_time": 18446744073709551615u64,
  "compliance_key": "",
  "num_children": 0,
  "compliance_key_rotation_events_key": format!("0200000000000000{}", address),
  @@ -354,13 +354,13 @@ mod tests {
  create_account(
  address,
  serde_json::json!([{
  - "amount": 2147483648u64,
  + "amount": 4611685774556657903u64,
  "currency": "LBR",
  }]),
  serde_json::json!({
  "base_url": "",
  "compliance_key": "",
  - "expiration_time": 1999587372,
  + "expiration_time": 18446744073709551615u64,
  "human_name": "moneybags",
  "preburn_balances": [{
  "amount": 0,
  