Bug 136246 [regression]Export data exported error column name.
Description: Export data exported error column name. Steps to reproduce: 1. export data in a table, select several columns. Expected result: Selected column name and data are exported. Actual result: No matter what columns you selected, exported columns name always display columns beginning from the first, and then the second, and so on.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
caption = iMetaData.getColumnLabel( i );
						if ( caption != null )
						{
							buf.append( caption );
						}
						else
						{
							buf.append( iMetaData.getColumnName( i ) );
						}
					}
					outputStream.println( buf.toString( ) );
					buf.delete( 0, buf.length( ) );
					
					while ( iData.next( ) )
					{
						String value = null;
						try
						{
							value = cvsConvertor( (String) DataTypeUtil
									.convert( iData.getValue( columnNames[0] ),
											DataType.STRING_TYPE ) );
						}
						catch ( Exception e )
						{
							value = null;
						}
						if ( value != null )
						{
							buf.append( value );
						}