FIREFLY-1534: Check for utype in the table's resources if one does not exist in the table.

[loitly]

Ticket: https://jira.ipac.caltech.edu/browse/FIREFLY-1534

should work like this:

If the table has a Utype, use it.
If the table does not have a Utype, search "outwards" in the enclosing elements in the XML and use the first one you find. Thus, in the typical nesting: <VOTABLE><RESOURCE><TABLE></TABLE></RESOURCE></VOTABLE> , you would start with the TABLE, and then check the RESOURCE containing it.

Test: https://fireflydev.ipac.caltech.edu/firefly-1534-spectrum-utype/firefly/

• Load a spectrum where utype is not from <TABLE> but from <RESOURCE>