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
{
		private Object container;
		private ResultSetColumnHandle dataSetColumn;
		public GroupKeySetRule( Object container,
				ResultSetColumnHandle dataSetColumn )
		{
			this.container = container;
			this.dataSetColumn = dataSetColumn;
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.report.designer.internal.ui.dnd.InsertInLayoutUtil.InsertInLayoutRule#canInsert()
		 */
		public boolean canInsert( )
		{
			return getGroupContainer( container ) != null
					&& getGroupHandle( container ).getKeyExpr( ) == null
					&& ( getGroupContainer( container ).getDataSet( ) == getDataSetHandle( dataSetColumn ) || getGroupContainer( container ).getDataSet( ) == null );
		}
		/*
		 * (non-Javadoc)
		 * 
		 * @see org.eclipse.birt.report.designer.internal.ui.dnd.InsertInLayoutUtil.InsertInLayoutRule#getInsertPosition()
		 */
		public Object getInsertPosition( )