On a fresh install of openSUSE:Tumbleweed, when installing yubioath-desktop via
one-click, not all dependent packages are installed, causing `yubioath` and
`yubioath-cli` to error with the following:

```
$ yubioath-cli
Traceback (most recent call last):
  File "/usr/bin/yubioath-cli", line 6, in <module>
    from pkg_resources import load_entry_point
ImportError: No module named pkg_resources
$
```

`pkg_resources` is contained within the SUSE package `python-setuptools` which
is present in yubioath-desktop's BuildRequires, but not Requires.