Bug 211703 Support muti-view on report item.
As title described.
xtab/org.eclipse.birt.report.item.crosstab.core/src/org/eclipse/birt/report/item/crosstab/core/de/CrosstabReportItemHandle.java
/**
	 * Pivots a measure with the given name to the specified position.
	 * 
	 * @param name
	 * @param toIndex
	 * @throws SemanticException
	 */
	public void pivotMeasure( String name, int toIndex )
			throws SemanticException
	{
		MeasureViewHandle measureView = getMeasure( name );
		if ( measureView == null )
		{
			logger.log( Level.SEVERE,
					MessageConstants.CROSSTAB_EXCEPTION_DIMENSION_NOT_FOUND,
					name );
			throw new CrosstabException( handle.getElement( ), new String[]{
					name, handle.getElement( ).getIdentifier( )},
					MessageConstants.CROSSTAB_EXCEPTION_DIMENSION_NOT_FOUND );
		}
		measureView.handle.moveTo( toIndex );
	}
	/**
	 * Pivots a measure in the given position to the specified position.
	 * 
	 * @param fromIndex
	 * @param toIndex
	 * @throws SemanticException
	 */
	public void pivotMeasure( int fromIndex, int toIndex )