Bug 130492 Provide a method to serialize the report with library information.
Currently, when engine generate the report document file, the document does not contain any library information. That will cause many propblem on server side. Model should provide a method to serialize the report with library information to a stream so that the generated report document can contain all information that the report need.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ModelUtil.java
DesignElement virtualChild = (DesignElement) iter2.next( );
			duplicateProperties( virtualParent, virtualChild );
		}
	}
	/**
	 * Duplicates some properties in a design element when to export it.
	 * 
	 * @param from
	 *            the from element to get the property values
	 * @param to
	 *            the to element to duplicate the property values
	 */
	private static void duplicateProperties( DesignElement from,
			DesignElement to )
	{
		if ( from.getDefn( ).allowsUserProperties( ) )
		{
			Iterator iter = from.getUserProperties( ).iterator( );
			while ( iter.hasNext( ) )
			{
				UserPropertyDefn userPropDefn = (UserPropertyDefn) iter.next( );
				to.addUserPropertyDefn( userPropDefn );
			}
		}
		Iterator iter = from.getDefn( ).getProperties( ).iterator( );
		while ( iter.hasNext( ) )
		{
			ElementPropertyDefn propDefn = (ElementPropertyDefn) iter.next( );
			String propName = propDefn.getName( );