Bug 145021 Enhance the agrregate on option in column binding dialog
1. Check if the expression is aggregate expression by data utility class. 2. If yes, the option is ?all? and group name list 3. if not, the option disabled (or set to none?) if the column binding is in detail row. If the column binding is in group row, the option is ?None? and group name list.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/util/DataUtil.java
{
				IBaseDataSourceDesign dataSourceDesign = adaptor.createDataSourceDesign( dataSet.getDataSource( ) );
				engine.defineDataSource( dataSourceDesign );
			}
			if ( dataSet instanceof JointDataSetHandle )
			{
				defineSourceDataSets( engine, dataSet, dataSetDesign );
			}
			engine.defineDataSet( dataSetDesign );
			return dataSetDesign;
		}
		return null;
	}
	/**
	 * @param dataSet
	 * @param dataSetDesign
	 * @throws BirtException
	 */
	private static void defineSourceDataSets( DataEngine engine,
			DataSetHandle dataSet, IBaseDataSetDesign dataSetDesign )
			throws BirtException
	{
		List dataSets = dataSet.getModuleHandle( ).getAllDataSets( );
		for ( int i = 0; i < dataSets.size( ); i++ )
		{
			DataSetHandle dsHandle = (DataSetHandle) dataSets.get( i );
			if ( dsHandle.getName( ) != null )
			{
				if ( dsHandle.getName( )
						.equals( ( (IJointDataSetDesign) dataSetDesign ).getLeftDataSetDesignName( ) )