Bug 147977 Chart editor does not use container's column bindings
1) create data source 2) create data set: select * from customers 3) create table 4) bind country, customer name to table 5) group by country 6) create a binding for total_by_country which aggregates # of customers in each country. put a data element in group footer and bind to total_by_country 7) in group header put chart 8) in data tab specify inherit from container Result: You see columns for report data set created in step 2. Expected Result: Just 3 columns for the 3 bindings created in 4 and 6.
data/org.eclipse.birt.data.tests/test/org/eclipse/birt/data/engine/impl/rd/ReportDocumentTest.java
* 1: sub query is added on the query, not on group
	 * 2: the point of the parent query moves to the end
	 * 
	 * @throws BirtException
	 */
	public void testSubQuery2( ) throws BirtException
	{
		this.genSubQuery2( );
		this.closeArchiveWriter( );
		
		DataEngineContext deContext2 = newContext( DataEngineContext.MODE_PRESENTATION,
				fileName );
		myPreDataEngine = DataEngine.newDataEngine( deContext2 );
				
		this.preSubQuery2( );
		this.closeArchiveReader( );
	}
	
	/**
	 * @throws BirtException
	 */
	private void genSubQuery2( ) throws BirtException
	{
		QueryDefinition queryDefn = newReportQuery( );
		SubqueryDefinition subQueryDefn = new SubqueryDefinition( subQueryName );
		queryDefn.addSubquery( subQueryDefn );
		
		
		IBaseExpression[] rowBeArray = getRowExpr( );
		IBaseExpression[] totalBeArray = getAggrExpr( );