code: public static Properties combineSysAndJobProperties(Properties sysProps, Properties jobProps) {
      Properties combinedJobProps = new Properties();
      combinedJobProps.putAll(sysProps);
      combinedJobProps.putAll(jobProps);
      return combinedJobProps;
    }
docs: Get a new {@link Properties} instance by combining a given system configuration {@link Properties}
  object (first) and a job configuration {@link Properties} object (second).
  
  @param sysProps the given system configuration {@link Properties} object
  @param jobProps the given job configuration {@link Properties} object
  @return a new {@link Properties} instance