Bug 156969 [regression]Group header repeat doesn't work in Web Viewer.
Description: Group header repeat doesn't work in Web Viewer. Steps to reproduce: 1. New a data source and dataset, drag the dataset to Layout. 2. Add a group. 3. Set page break in the first data item in table detail row. 4. Preview in web viewer&#12290; Expected result: Group header is repeated in each page. Actual result: No group header repeat effect.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/ir/EngineIRReader.java
if ( IOUtil.readBool( in ) )
				{
					TableBandDesign footer = (TableBandDesign) readDesign( in );
					table.setFooter( footer );
				}
				return table;
			}
			case TABLE_GROUP_DESIGN :
			{
				TableGroupDesign tableGroup = new TableGroupDesign( );
				readTableGroup( dis, tableGroup );
				
				if ( IOUtil.readBool( in ) )
				{
					TableBandDesign groupHeader = (TableBandDesign) readDesign( in );
					tableGroup.setHeader( groupHeader );
				}
				
				if ( IOUtil.readBool( in ) )
				{
					TableBandDesign footer = (TableBandDesign) readDesign( in );
					tableGroup.setFooter( footer );
				}
				return tableGroup;
			}
			case TABLE_BAND_DESIGN :
			{
				TableBandDesign band = new TableBandDesign( );
				readTableBand( dis, band );