Bug 136279 Structure and table datatypes should be hidden.
Description: Structure and table datatype should be hidden. Steps to reproduce: In table data binding, I saw structure and table two datatypes. They are not supported now, so they should be removed.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/adapter/ModelDteApiAdapter.java
* Find the DtE columnDefn from the given list of columnDefns that matches
	 * the given columnName.
	 */
	private ColumnDefinition findColumnDefn( List columnDefns, String columnName )
	{
		assert columnName != null;
		if ( columnDefns == null )
			return null; 
		Iterator iter = columnDefns.iterator( );
		if ( iter == null )
			return null;
		
		
		while ( iter.hasNext( ) )
		{
			ColumnDefinition column = ( ColumnDefinition ) iter.next( );
			if ( columnName.equals( column.getColumnName( ) ) )
				return column;
		}
		return null;
	}
	public static int toDteDataType( String modelDataType )
	{
		if ( modelDataType == null )
			return DataType.UNKNOWN_TYPE;
		if ( modelDataType.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_ANY ) )
			return DataType.ANY_TYPE;
		if ( modelDataType
				.equals( DesignChoiceConstants.COLUMN_DATA_TYPE_INTEGER ) )
			return DataType.INTEGER_TYPE;