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
property( obj, IDesignElementModel.REF_TEMPLATE_PARAMETER_PROP );
		property( obj, ISimpleDataSetModel.DATA_SET_ROW_LIMIT );
		writeStructureList( obj, ISimpleDataSetModel.PARAM_BINDINGS_PROP );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitDataSource(org.eclipse.birt.report.model.elements.DataSource)
	 */
	public void visitDataSource( DataSource obj )
	{
		super.visitDataSource( obj );
		property( obj, IDataSourceModel.BEFORE_OPEN_METHOD );
		property( obj, IDataSourceModel.BEFORE_CLOSE_METHOD );
		property( obj, IDataSourceModel.AFTER_OPEN_METHOD );
		property( obj, IDataSourceModel.AFTER_CLOSE_METHOD );
	}
	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.birt.report.model.elements.ElementVisitor#visitParameter(org.eclipse.birt.report.model.elements.Parameter)
	 */
	public void visitParameter( Parameter obj )
	{
		super.visitParameter( obj );
		property( obj, IParameterModel.HIDDEN_PROP );
		resourceKey( obj, IParameterModel.HELP_TEXT_KEY_PROP,
				IParameterModel.HELP_TEXT_PROP );
		property( obj, IParameterModel.VALIDATE_PROP );
	}