LP#1928684 Catalog view holds tab sort by patron barcode error

LP#1928684 Catalog view holds tab sort by patron barcode error

This changes the Patron Barcode column name to ucard_barcode to
match the field name in the database.

Note: due to the name change, users who saved the column on the
grid will have to add it again.

To test:
1. Go to the View Holds tab on a record that has hold requests
2. Add the Patron Barcode column to the grid
3. Sort by the barcode column and note that it works
4. It's a good idea to test that the grid settings save properly

Signed-off-by: Dan Briem <dbriem@wlsmail.org>
Signed-off-by: Garry Collum <gcollum@gmail.com>
Signed-off-by: Galen Charlton <gmc@equinoxOLI.org>