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
{
			return null;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.report.designer.internal.ui.dnd.InsertInLayoutUtil.InsertInLayoutRule#insert(java.lang.Object)
		 */
		public void insert( Object object ) throws SemanticException
		{
			Assert.isTrue( object instanceof ResultSetColumnHandle );
			Assert.isTrue( object == dataSetColumn || object == null );
			getGroupContainer( container ).setDataSet( getDataSetHandle( dataSetColumn ) );
			getGroupHandle( container ).setKeyExpr( DEUtil.getColumnExpression( dataSetColumn.getColumnName( ) ) );
		}
		protected DataSetHandle getDataSetHandle( ResultSetColumnHandle model )
		{
			return (DataSetHandle) model.getElementHandle( );
		}
		protected GroupHandle getGroupHandle( Object target )
		{
			DesignElementHandle handle = null;
			if ( target instanceof CellHandle )
			{
				handle = ( (CellHandle) target ).getContainer( ).getContainer( );
			}
			else if ( target instanceof ListBandProxy )
			{
				handle = ( (ListBandProxy) target ).getElemtHandle( );
			}