Bug 188578 Add "displayColumnName" on TabularLevel
Add Property "displayColumnName" on TabbularLevel and corresponding APIs on handle. Property Type: expression.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/writer/ModuleWriter.java
resourceKey( obj,
				ITemplateParameterDefinitionModel.DESCRIPTION_ID_PROP,
				ITemplateParameterDefinitionModel.DESCRIPTION_PROP );
		writeContents( obj, ITemplateParameterDefinitionModel.DEFAULT_SLOT,
				DesignSchemaConstants.DEFAULT_TAG );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitTemplateReportItem(org.eclipse.birt.report.model.elements.TemplateReportItem)
	 */
	public void visitTemplateReportItem( TemplateReportItem obj )
	{
		
		boundColumnsMgr.dealTemplateReportItem( obj, getModule( ) );
		writer.startElement( DesignSchemaConstants.TEMPLATE_REPORT_ITEM_TAG );
		super.visitTemplateReportItem( obj );
		writeStructureList( obj, TemplateReportItem.VISIBILITY_PROP );
		writeUserPropertyDefns( obj );
		writeUserPropertyValues( obj );
		writer.endElement( );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitStyle(org.eclipse.birt.report.model.elements.Style)
	 */
	public void visitStyle( Style obj )
	{