Bug 182680 Use feature of new Aggregation framework of Data Engine.
DataEngine will implement new aggregation framework in 2.2.0RC0. After the implementation is finished Engine should go ahead to use new column bindings in definition of map/highlight.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
* An item needs query when it satisfies following conditions:
		 * <li>Has column bindings.
		 * <li>Is a table or a list.
		 * <li>Has hightlight rules and doesn't have parent query.
		 * 
		 * @param item
		 *            the item.
		 * @return true if it needs query.
		 */
		private boolean needQuery( ReportItemDesign item, IBaseQueryDefinition query )
		{
			DesignElementHandle handle = item.getHandle( );
			if ( handle instanceof ReportItemHandle )
			{
				ReportItemHandle designHandle = (ReportItemHandle) item.getHandle( );
				if ( designHandle.columnBindingsIterator( ).hasNext( ) )
				{
					return true;
				}
				if ( designHandle instanceof ListingHandle )
				{
					return true;
				}
				if ( designHandle instanceof ExtendedItemHandle )
				{
					ExtendedItemHandle extHandle = (ExtendedItemHandle) designHandle;
					return ExtensionManager.getInstance( ).getAllRows(
							extHandle.getExtensionName( ) );
				}
			}