Bug 205709 Translation table is missed when report design is flattened
It happens when a report design with a localization property file and some library (otherwise it's not flattened!) is executed. Such report document has no transaltion table and then can not be localized. The problem is in org.eclipse.birt.report.model.util.ReportDesignSerializer#visitReportDesign which does not copy the translation table from ReportDesignSerializer#sourceDesign to ReportDesignSerializer#targetDesign.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/util/ReportDesignSerializer.java
*            a given parent element.
	 * @return a handle to extended item, return <code>null</code> if the
	 *         definition with the given extension name is not found
	 * @throws ExtendsException
	 */
	private ExtendedItemHandle newExtendedItem( String name,
			String extensionName, ExtendedItemHandle parent )
			throws ExtendsException
	{
		MetaDataDictionary dd = MetaDataDictionary.getInstance( );
		ExtensionElementDefn extDefn = (ExtensionElementDefn) dd
				.getExtension( extensionName );
		if ( extDefn == null )
			return null;
		if ( parent != null )
			assert ( (ExtendedItem) parent.getElement( ) ).getExtDefn( ) == extDefn;
		if ( !( extDefn instanceof PeerExtensionElementDefn ) )
			throw new IllegalOperationException(
					"Only report item extension can be created through this method." ); 
		ExtendedItem element = new ExtendedItem( name );
		
		element.setProperty( IExtendedItemModel.EXTENSION_NAME_PROP,
				extensionName );
		if ( parent != null )
		{
			element.getHandle( targetDesign ).setExtends( parent );
		}
		targetDesign.makeUniqueName( element );
		ExtendedItemHandle handle = element.handle( targetDesign );
		try