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/document/RDSave.java
private Map exprValueMap = new HashMap( );
	
	/**
	 * @param context
	 * @param queryResultID
	 * @param subQueryName
	 * @param subQueryIndex
	 * @throws DataException
	 */
	public RDSave( DataEngineContext context, String queryResultID,
			int rowCount, String subQueryName, int subQueryIndex )
			throws DataException
	{
		this.context = context;
		this.queryResultID = queryResultID;
		this.subQueryName = subQueryName;
		this.rowCount = rowCount;
		
		if ( subQueryName != null )
			this.subQueryID = subQueryName + "/" + subQueryIndex;
		
		this.lastRowIndex = 0;
	}
	
	/**
	 * init save environment
	 */
	private void initSave( ) throws DataException
	{