Bug 155509 ModuleHandle findResource method does not support .properties files
There is no fileType for .properties files in IResourceLocator
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
*            the name of the element to find
	 * @return a handle to the element, or <code>null</code> if the element
	 *         was not found.
	 */
	public DesignElementHandle findElement( String name )
	{
		DesignElement element = module.findElement( name );
		if ( element == null )
			return null;
		return element.getHandle( element.getRoot( ) );
	}
	/**
	 * Finds the image with the given name.
	 * 
	 * @param name
	 *            the image name
	 * @return embedded image with the given name. Return <code>null</code>,
	 *         if not found.
	 */
	public EmbeddedImage findImage( String name )
	{
		return module.findImage( name );
	}
	/**
	 * Finds the config variable with the given name.
	 * 
	 * @param name
	 *            the variable name
	 * @return the config variable with the given name. Return <code>null</code>,
	 *         if not found.