not able to load properties file with runnable jar

I have maven project in Java in which I have a property file (quartz.properties) under this directory:

/src/main/resources

Now I can use this property file in two ways from this class as shown below:

/**
 * Create a StdSchedulerFactory that has been initialized via
 * <code>{@link #initialize(Properties)}</code>.
 *
 * @see #initialize(Properties)
 */
public StdSchedulerFactory(Properties props) throws SchedulerException {
    initialize(props);
}

/**
 * Create a StdSchedulerFactory that has been initialized via
 * <code>{@link #initialize(String)}</code>.
 *
 * @see #initialize(String)
 */
public StdSchedulerFactory(String fileName) throws SchedulerException {
    initialize(fileName);
}

So I started using like this:

public static void main(String[] args) {
    StdSchedulerFactory factory = new StdSchedulerFactory();
    try {
        factory.initialize(TestClassName.class.getClassLoader().getResourceAsStream("quartz.properties"));
        Scheduler scheduler = factory.getScheduler();
        scheduler.start();
    } catch (SchedulerException ex) {
        System.out.println("error= " + ExceptionUtils.getStackTrace(ex));
    }
}

This works fine without any issues in my windows laptop but when I make a runnable jar (export --> runnable jar --> Package required libraries into generated JAR) and then if I run like this on my other ubuntu machine:

java -jar abc.jar

I am getting this exception:

error= org.quartz.SchedulerException: Error loading property data from InputStream - InputStream is null.
        at org.quartz.impl.StdSchedulerFactory.initialize(StdSchedulerFactory.java:576)
        at com.example.quartz.TestClassName.main(TestClassName.java:17)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:601)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)

What is wrong I am doing?

Update:- Output from jar tvf abc.jar . I am just showing relevant things not all.

    13 Thu Sep 10 18:16:30 GMT-07:00 2015 resources/build.properties
   594 Thu Sep 10 18:16:30 GMT-07:00 2015 resources/quartz.properties
  1254 Thu Sep 10 18:16:30 GMT-07:00 2015 resources/quartz_config.xml