Bug 182895 Support sort on Level attribute.
Currently in OLAP engine we only support sort on level key value. We should go ahead to support sort on level attribute value.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/olap/driver/DimensionAxis.java
}
	/**
	 * 
	 * @return
	 * @throws OLAPException
	 */
	public boolean isFirst( ) throws OLAPException
	{
		return this.edgeInfo.dim_isFirst( dimAxisIndex );
	}
	/**
	 * 
	 * @return
	 * @throws OLAPException
	 */
	public boolean isLast( ) throws OLAPException
	{
		return this.edgeInfo.dim_isLast( dimAxisIndex );
	}
	/**
	 * Moves the cursor to the end of the result set, just after the last row
	 * 
	 * @throws OLAPException
	 */
	public void afterLast( ) throws OLAPException
	{
		this.edgeInfo.dim_afterLast( dimAxisIndex );
	}
	/**
	 * Moves the cursor to the front of the result set, just before the first