Bug 146771 [Regression]Preferences-Element Names-OdaDataSet, can not take effect
[Regression]Preferences-Element Names-OdaDataSet, can not take effect Steps: 1.Open Windows - reference - Element Names 2.Set the named of OdaDataSet as "odads" 3.New a report design and a odadatasource 4.New dataset apply this datasource Actual Results: 1.Data set default name is Data Set Expected Results: 1.The name of dataset that created is odads
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/ReportPlugin.java
* 
	 * @param defaultName
	 *            The default Name preference The Stringbuffer which string
	 *            added to
	 */
	private void appendDefaultPreference( String defaultName,
			StringBuffer preference )
	{
		if ( defaultName.equals( ReportDesignConstants.DATA_ITEM ) ) 
		{
			preference.append( Messages.getString( "DesignerPaletteFactory.toolTip.dataReportItem" ) ); 
		}
		else if ( defaultName.equals( ReportDesignConstants.GRID_ITEM ) ) 
		{
			preference.append( Messages.getString( "DesignerPaletteFactory.toolTip.gridReportItem" ) ); 
		}
		else if ( defaultName.equals( ReportDesignConstants.IMAGE_ITEM ) ) 
		{
			preference.append( Messages.getString( "DesignerPaletteFactory.toolTip.imageReportItem" ) ); 
		}
		else if ( defaultName.equals( ReportDesignConstants.LABEL_ITEM ) ) 
		{
			preference.append( Messages.getString( "DesignerPaletteFactory.toolTip.labelReportItem" ) ); 
		}
		else if ( defaultName.equals( ReportDesignConstants.LIST_ITEM ) ) 
		{
			preference.append( Messages.getString( "DesignerPaletteFactory.toolTip.listReportItem" ) ); 
		}
		else if ( defaultName.equals( ReportDesignConstants.TABLE_ITEM ) ) 
		{