Bug 141064 Remove group level data binding
This bug covers the engine part of the task to remove group level data binding. After the hange, all binding expressions will be defined on the table level, and each binding expression will have an AggregateOn field to explicitly define the group level for that expression.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
addSortAndFilter( item, query );
			
			ResultMetaData metaData = new ResultMetaData( query );
			resultMetaData.put( query, metaData );
			return query;
		}
		private void addSortAndFilter( ReportItemDesign item, BaseQueryDefinition query )
		{
			if ( item instanceof ListingDesign )
			{
				query.getSorts( )
						.addAll( createSorts( (ListingDesign) item ) );
				query.getFilters( )
						.addAll( createFilters( (ListingDesign) item ) );
			}
			else if ( item instanceof ExtendedItemDesign )
			{
				query.getFilters( ).addAll(
						createFilters( (ExtendedItemDesign) item ) );
			}
		}
		protected BaseQueryDefinition createSubQuery( ReportItemDesign item )
		{
			ReportItemHandle designHandle = (ReportItemHandle) item.getHandle( );
			BaseQueryDefinition query = null;
			IBaseTransform parentQuery = getTransform( );
			
			if ( parentQuery == null )
			{