Bug 136045 the display name does not work
Description: the display name does not work Steps to reproduce: 1. new a datasource and a dataset 2. In the window 'Edit dataset'. click the tab 'Output columns' 3. set a display name on a column Actual result: The display name does not work, however, it is still the column name
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
{
						LabelHandle labelItemHandle = SessionHandleAdapter.getInstance( )
								.getReportDesignHandle( )
								.getElementFactory( )
								.newLabel( null );
						
						
						
						if ( columns[j].getColumnName( ) != null )
						{
							boolean hasDisplayName = false;
							for ( Iterator iter = model.columnHintsIterator( ); iter.hasNext( ); )
							{
								ColumnHintHandle hint = (ColumnHintHandle) iter.next( );
								if ( columns[j].getColumnName( )
										.equals( hint.getColumnName( ) ) )
								{
									labelItemHandle.setText( hint.getDisplayName( ) );
									hasDisplayName = true;
									break;
								}
							}
							if ( !hasDisplayName )
							{
								labelItemHandle.setText( columns[j].getColumnName( ) );
							}
						}
						cell.addElement( labelItemHandle, cells.getSlotID( ) );
					}
					else