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/RDLoad.java
* @return
	 * @throws DataException
	 */
	int getEndingGroupLevel( ) throws DataException
	{
		return this.rdGroupUtil.getEndingGroupLevel( );
	}
	/**
	 * @throws DataException
	 */
	public void close( ) throws DataException
	{
		try
		{
			if ( dis != null )
			{
				dis.close( );
				bis.close( );
				is.close();
			}
		}
		catch ( IOException e )
		{
			
		}
	}
	/**
	 * Provider group info function for RDLoad
	 */
	private class CacheProviderImpl implements CacheProvider