Bug 192789 Support to render reportlet using bookmark in frameset servlet.
Description: Support to render reportlet using bookmark in frameset servlet. At present, only run and preview servlet support __isreportlet&__bookmark to generate reportlet.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/BirtViewerReportService.java
locale = (Locale) options.getOption( InputOptions.OPT_LOCALE );
			if ( locale == null )
				locale = Locale.getDefault( );
			ITOCTree tocTree = doc.getTOCTree(
					DesignChoiceConstants.FORMAT_TYPE_VIEWER, ULocale
							.forLocale( locale ) );
			if ( tocId != null )
			{
				node = tocTree.findTOC( tocId );
			}
			else
			{
				node = tocTree.findTOC( null );
			}
		}
		if ( node == null )
		{
			if ( doc != null )
				doc.close( );
			throw new ReportServiceException(
					BirtResources
							.getMessage( ResourceConstants.REPORT_SERVICE_EXCEPTION_INVALID_TOC ) );
		}
		if ( doc != null )
			doc.close( );
		return transformTOCNode( node );
	}
	/**
	 * @see org.eclipse.birt.report.service.api.IViewerReportService#findTocByName(java.lang.String,
	 *      java.lang.String, org.eclipse.birt.report.service.api.InputOptions)