code: private static Properties getEnvironmentFile(File configFile) {
          Properties mergedProperties = new Properties();
  
          InputStream inputStream;
          try {
              inputStream = new FileInputStream(configFile);
          } catch (FileNotFoundException e) {
              // File does not exist. That's all right.
              return mergedProperties;
          }
          try {
              mergedProperties.load(inputStream);
              inputStream.close();
              return mergedProperties;
          } catch (IOException e) {
              throw new RuntimeException(e);
          }
      }
docs: Leser properties fra classpath og vil overlaste i reverse order, slik at
  classpath reverse order styrer hvilke props som gjelder.
  
  @param configFile the file to read properties from
  @return Properties med properties i overridden form
  @throws {@link java.io.IOException}, {@link RuntimeException}