47c3278 fedora: Also catch FedfindError from fedfind `get_release`

Authored and Committed by adamwill 6 years ago
    fedora: Also catch FedfindError from fedfind `get_release`
    
    In fedfind 4.x, `get_release` can raise FedfindErrors as well
    as ValueErrors, so best catch those too.
    
    Signed-off-by: Adam Williamson <awilliam@redhat.com>