Bug 136241 [regression]Preview template in web viewer and pdf didn't get correct effect.
Description: Preview template items in web viewer and pdf didn't get correct effect. Steps to reproduce: 1. Create template items. 2. Preview in Web Viewer and pdf. Expected result: Same effect as in html. Actual result: In web viewer, see only blank box. In pdf, blank page.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
* <ul>
	 * <li>A property value is either a style property or a non-style property.
	 * </li>
	 * <li>A non-style property is set if this element, or any of its ancestor
	 * elements, provide a value. It is also considered set if the system
	 * provides a default value.</li>
	 * <li>A property value is considered set only if it is set in the private
	 * style of this element or an ancestor element; it is not considered set if
	 * it is inherited from a shared style.</li>
	 * </ul>
	 * 
	 * @param module
	 *            module
	 * @param propName
	 *            name of the property
	 * @return the value of the property according to the rules explained above
	 */
	public Object getFactoryProperty( Module module, String propName )
	{
		ElementPropertyDefn prop = getPropertyDefn( propName );
		
		if ( prop == null )
			return null;
		return getFactoryProperty( module, prop );
	}
	/**
	 * Resolves a property element reference. The reference is the value of a
	 * property of type property element reference.
	 * 
	 * @param module