function convert_output_data fails if data contains set of tuples

[Bulat Gaifullin]

If input data contains set of tuples or set of frozen sets. and option 'yaql.convertSetsToLists' is not specified.
the method convert_output_data[1] fails with error: 'TypeError: unhashable type: 'list''
because tuple will be converted to list (if option 'yaql.convertTuplesToLists' is not specified as False)

[1] https://github.com/openstack/yaql/blob/1.1.0/yaql/language/utils.py#L92-L95