Bug 211703 Support muti-view on report item.
As title described.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/internal/CrosstabReportItemTask.java
if ( targetCrosstabView.getDimensionCount( ) == 0
					&& targetCrosstabView.getGrandTotal( ) == null )
			{
				
				
				for ( int i = 0; i < srcCrosstabView.getDimensionCount( ); i++ )
				{
					DimensionViewHandle dv = srcCrosstabView.getDimension( i );
					for ( int j = 0; j < dv.getLevelCount( ); j++ )
					{
						LevelViewHandle lv = dv.getLevel( j );
						if ( lv.getAggregationHeader( ) != null )
						{
							for ( int k = 0; k < crosstab.getMeasureCount( ); k++ )
							{
								MeasureViewHandle mv = crosstab.getMeasure( k );
								String rowDimension = null;
								String rowLevel = null;
								String colDimension = dv.getCubeDimensionName( );
								String colLevel = lv.getCubeLevelName( );
								if ( srcCrosstabView.getAxisType( ) == ROW_AXIS_TYPE )
								{
									rowDimension = colDimension;
									rowLevel = colLevel;
									colDimension = null;
									colLevel = null;
								}
								AggregationCellHandle aggCell = mv