message: Fixed ledger tests
diff: @@ -244,7 +244,7 @@ mod tests {
  let identifier = "identifier";
  let dest = "dest";
  - let expected_result = r#""identifier":"identifier","operation":{"type":"1","dest":"dest",role:null}"#;
  + let expected_result = r#""identifier":"identifier","operation":{"type":"1","dest":"dest","role":null}"#;
  let nym_request = ledger_service.build_nym_request(identifier, dest, None, None, None);
  assert!(nym_request.is_ok());
  @@ -272,7 +272,7 @@ mod tests {
  let verkey = "verkey";
  let alias = "some_alias";
  - let expected_result = r#""identifier":"identifier","operation":{"type":"1","dest":"dest","verkey":"verkey","alias":"some_alias"}"#;
  + let expected_result = r#""identifier":"identifier","operation":{"type":"1","dest":"dest","verkey":"verkey","alias":"some_alias","role":null}"#;
  let nym_request = ledger_service.build_nym_request(identifier, dest, Some(verkey), Some(alias), None);
  assert!(nym_request.is_ok());
  