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
*      current root design
	 * @return
	 *      queries array of this design
	 */
	public IDataQueryDefinition[] build( IDataQueryDefinition parentQuery, ReportItemDesign design )
	{
		synchronized ( report )
		{			
			Object result = design.accept( queryBuilder, parentQuery );
			
			if ( result == null )
			{
				return null;
			}
			IDataQueryDefinition[] queries = (IDataQueryDefinition[]) result;
				
			design.setQueries( queries );
			for ( int i = 0; i < queries.length; i++ )
			{
				IDataQueryDefinition query = queries[i];
				if ( query != null )
				{						
					this.queryIDs.put( query, String.valueOf( design
							.getID( ) )
							+ "_" + String.valueOf( i ) );
					
					if ( query instanceof IBaseQueryDefinition )
					{
						ResultMetaData metaData = new ResultMetaData( (IBaseQueryDefinition)query );
						resultMetaData.put( query, metaData );