Bug 119566 Support template items in page header/footer
Currently you can't create template report items inside a page header/footer. This should be fixed.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/DesignElement.java
* @return the property value, or null if no value is set.
	 */
	protected Object getPropertyFromSlotSelector( Module module,
			ElementPropertyDefn prop )
	{
		if ( getContainer( ) == null )
			return null;
		String selector = getContainer( ).getSelector( getContainerSlot( ) );
		return getPropertyFromSelector( module, prop, selector );
	}
	/**
	 * Returns the property value which is related to container.
	 * 
	 * @param module
	 *            the module
	 * @param prop
	 *            the definition of property
	 * @return the property value, or null if no value is set.
	 */
	protected Object getPropertyRelatedToContainer( Module module,
			ElementPropertyDefn prop )
	{
		return null;
	}
	/**
	 * Returns the property value.
	 * 
	 * @param module
	 *            the module
	 * @param prop