Bug 145691 the result set selection list in viewer data export shows names with *_<number>
Create a report with mulitple table, dynamic text, or list that has data binding. preview the report in web viewer, try to export data from the web viewer. A selection list of result sets is pompted to the user. The names of these result sets seems to be a report item name plus "_nnnn" appended at the end. It is not user friendly to show this internal numbers. It will be better to show the table name, or the list name, or the report item name that has the result set in the selection list.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/DataExtractionTask.java
* get the rset id from the rset name.
	 * 
	 * @param id
	 * @return
	 */
	protected String rsetId2Name( String id )
	{
		
		Iterator iter = rsetName2IdMapping.entrySet( ).iterator( );
		while ( iter.hasNext( ) )
		{
			Map.Entry entry = (Map.Entry) iter.next( );
			String rsetId = (String) entry.getValue( );
			String rsetName = (String) entry.getKey( );
			if ( rsetId.equals( id ) )
			{
				return rsetName;
			}
		}
		return null;
	}
	/**
	 * get the rset name from the rset id.
	 * 
	 * @param name
	 * @return
	 */
	protected String rsetName2Id( String name )
	{
		return (String) rsetName2IdMapping.get( name );