message: use std::time::Instant instead of SystemTime
diff: @@ -854,22 +854,22 @@ mod tests {
  #[test]
  fn wallet_service_create_wallet_works_for_comparision_time_of_different_key_types() {
  - use std::time::SystemTime;
  + use std::time::Instant;
  _cleanup("wallet_service_create_wallet_works_for_comparision_time_of_different_key_types");
  let wallet_service = WalletService::new();
  let config = _config_default("wallet_service_create_wallet_works_for_comparision_time_of_different_key_types");
  - let time = SystemTime::now();
  + let time = Instant::now();
  wallet_service.create_wallet(&config, &ARGON_MOD_CREDENTIAL, (&MODERATE_KDD, &MODERATE_MASTER_KEY)).unwrap();
  - let time_diff_moderate_key = SystemTime::now().duration_since(time).unwrap();
  + let time_diff_moderate_key = time.elapsed();
  wallet_service.delete_wallet(&config, &ARGON_MOD_CREDENTIAL).unwrap();
  _cleanup("wallet_service_create_wallet_works_for_comparision_time_of_different_key_types");
  - let time = SystemTime::now();
  + let time = Instant::now();
  wallet_service.create_wallet(&config, &ARGON_INT_CREDENTIAL, (&INTERACTIVE_KDD, &INTERACTIVE_MASTER_KEY)).unwrap();
  - let time_diff_interactive_key = SystemTime::now().duration_since(time).unwrap();
  + let time_diff_interactive_key = time.elapsed();
  wallet_service.delete_wallet(&config, &ARGON_INT_CREDENTIAL).unwrap();
  assert!(time_diff_interactive_key < time_diff_moderate_key);
  