AllColumnsConverter should pay attention to column_index

[pdowler]

When expanding "SELECT * ..." into an explicit column list, the converter should use the column_index in the tap_schema to put the columns into a sensible order.

It is feasible that TapSchemaDAO.setOrdered(true) in the QueryRunner could possibly do that right (TableDesc.columns is a List which should preserve order) but it might be safer for AllColumnsConverter to do the sorting itself... in a really large service adding order by to the tap_schema might also not be a great idea.