Bug 139346 Using isTopN in table inside list group header doesn't work.
Description: Using isTopN in table inside list group header doesn't work. Steps to reproduce: 1.Insert a list with a group 2.Insert a table to list group header 3.Using Total.isTopN(row[],2,null,0) as filter expression in table item. 4.Preview Result: Only the first group displayed top 2 records, other groups kept display all records.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/QueryExecutor.java
odiDataSource = createOdiDataSource( ); 
				
				 
				
			    odiDataSource.setAppContext( queryAppContext );
				
				dataSource.openOdiDataSource( odiDataSource );
				
				dataSource.afterOpen();
			}
			else
			{
				
				odiDataSource = dataSource.getOdiDataSource();
				
				 
				
			    odiDataSource.setAppContext( queryAppContext );
			}
		}
	}
	
	/**
	 * Populates odiQuery with this query's definitions
	 * 
	 * @throws DataException
	 */
	protected void populateOdiQuery( ) throws DataException