Bug 123036 Data in a reprot is doubly stored
We currently stored data twice. Once in the content stream, once by DtE. The instance stored by content stream should not be there.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/impl/ResultIterator.java
checkStarted( );
		boolean hasNext = false;
		
		if ( state == BEFORE_FIRST_ROW )
		{
			state = ON_ROW;
			hasNext = odiResult.getCurrentResult( ) != null;
		}
		else
		{
			hasNext = odiResult.next( );
		}
		
		if ( useDetails == false && hasNext )
		{
			savedStartingGroupLevel = odiResult.getStartingGroupLevel( );
			odiResult.last( lowestGroupLevel );
		}
		logger.logp( Level.FINE,
				ResultIterator.class.getName( ),
				"next",
				"Moves down to the next element" );
		
		if ( ! hasNext )
			state = AFTER_LAST_ROW;
		
		return hasNext;
	}
	/**
	 * @param expr