Bug 182895 Support sort on Level attribute.
Currently in OLAP engine we only support sort on level key value. We should go ahead to support sort on level attribute value.
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/olap/api/CubeFeaturesTest.java
cqd.addSort( sorter2 );
		DataEngine engine = DataEngine.newDataEngine( DataEngineContext.newInstance( DataEngineContext.DIRECT_PRESENTATION,
				null,
				null,
				null ) );
		this.createCube( engine );
		IPreparedCubeQuery pcq = engine.prepare( cqd, null );
		ICubeQueryResults queryResults = pcq.execute( null );
		CubeCursor cursor = queryResults.getCubeCursor( );
		List columnEdgeBindingNames = new ArrayList();
		columnEdgeBindingNames.add( "edge1level1" );
		columnEdgeBindingNames.add( "edge1level2" );
		columnEdgeBindingNames.add( "edge1level3" );
		
		printCube( cursor, "country_year_total",
				"city_year_total", "dist_total", "city_total", "country_total","rowGrandTotal", "grandTotal",
				new String[] {"edge1level1","edge1level2","edge1level3"}, "edge2level1", "measure1" );
		
	
	}
	
	/**
	 * Test grand total
	 * @throws Exception
	 */
	public void testAggrSort3( ) throws Exception
	{
		ICubeQueryDefinition cqd = new CubeQueryDefinition( cubeName);
		IEdgeDefinition columnEdge = cqd.createEdge( ICubeQueryDefinition.COLUMN_EDGE );
		IEdgeDefinition rowEdge = cqd.createEdge( ICubeQueryDefinition.ROW_EDGE );