@Override
  public int hashCode() {
    return instanceName.hashCode();
  }
Conditional equivalency check between two {@link DataNodeConfig}.
@param other the other {@link DataNodeConfig} to compare with current config.
@param ignoreReplicaStatusFields whether to ignore replica status fields (i.e Sealed/Stopped/Disabled) in comparison.
@return {@code true} if two {@link DataNodeConfig}s are conditionally equivalent.
ambry-api/src/main/java/com/github/ambry/clustermap/DataNodeConfig.java