title: Add classpath to folder containing property files in Maven
body: <p>I have a property file which is not located in a classpath in Maven.</p>
  
  <p>Therefore I can't reach it with:</p>
  
  <p>ClassLoader.getSystemClassLoader().getResourceAsStream(PROPS_FILE);</p>
  
  <p>How can I add the folder containing the property file to the classpath, so it will be available during build and test of the project?</p>