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
.getString( "CrosstabReportItemHandle.msg.insert.measure" ) ); 
		MeasureViewHandle mv = null;
		try
		{
			ExtendedItemHandle extendedItemHandle = CrosstabExtendedItemFactory
					.createMeasureView( moduleHandle, measureHandle );
			if ( extendedItemHandle != null )
			{
				getMeasuresProperty( ).add( extendedItemHandle, index );
				
				new CrosstabReportItemTask( this ).validateCrosstab( );
				mv = (MeasureViewHandle) CrosstabUtil
						.getReportItem( extendedItemHandle );
			}
		}
		catch ( SemanticException e )
		{
			stack.rollback( );
			throw e;
		}
		stack.commit( );
		return mv;
	}
	/**
	 * Removes a dimension view that refers a cube dimension name with the given
	 * name from the design tree.
	 * 
	 * @param name
	 *            name of the dimension view to remove
	 * @throws SemanticException