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/internal/CrosstabReportItemTask.java
}
		DimensionViewHandle dimensionView = null;
		CommandStack stack = crosstab.getCommandStack( );
		stack.startTrans( Messages
				.getString( "CrosstabReportItemTask.msg.insert.dimension" ) ); 
		try
		{
			CrosstabViewHandle crosstabView = crosstab
					.getCrosstabView( axisType );
			if ( crosstabView == null )
			{
				
				
				
				crosstabView = crosstab.addCrosstabView( axisType );
			}
			
			dimensionView = crosstabView.insertDimension( dimensionHandle,
					index );
		}
		catch ( SemanticException e )
		{
			stack.rollback( );
			throw e;
		}
		stack.commit( );
		return dimensionView;
	}
	/**
	 * Removes a dimension view that refers a cube dimension name with the given