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
IBinding binding5 = new Binding( "measure1" );
		binding5.setExpression( new ScriptExpression("measure[\"measure1\"]") );
		cqd.addBinding( binding5 );
		
		IFilterDefinition filter1 = new FilterDefinition( new ConditionalExpression( "data[\"edge1level1\"]",
				IConditionalExpression.OP_EQ,
				"\"CNK\"" ) );
		
		cqd.addFilter( filter1 );
		
		DataEngine engine = DataEngine.newDataEngine( DataEngineContext.newInstance( DataEngineContext.DIRECT_PRESENTATION,
				null,
				null,
				null ) );
		try
		{
			this.createCube( engine );
			IPreparedCubeQuery pcq = engine.prepare( cqd, null );
			ICubeQueryResults queryResults = pcq.execute( null );
			queryResults.getCubeCursor( );
		}catch ( Exception e)
		{
			fail("Should not arrive here");
		}
	}
	
	/**
	 * Test grand total
	 * @throws Exception