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/api/impl/ResultMetaData.java
{
		String name;
		int type;
		MetaDataEntry( String name, int type )
		{
			this.name = name;
			this.type = type;
		}
	}
	protected void appendMetaData( IBaseQueryDefinition query )
	{
		Map bindings = query.getResultSetExpressions( );
		Iterator iter = bindings.entrySet( ).iterator( );
		while ( iter.hasNext( ) )
		{
			Map.Entry entry = (Map.Entry) iter.next( );