[leapp] upgrade failed with udev net persistent rules

Issue

Leapp fails after a python traceback during the reboot when persistent udev rules are set (to have persistent NIC names based on MAC address):

Dec 08 12:29:10 localhost upgrade[19164]: 2020-12-08 13:29:10.369 DEBUG    PID: 3 leapp.repository.system_upgrade_el7toel8: Starting actor discovery in actors/biosdevname
Dec 08 12:29:10 localhost upgrade[19164]: Process Process-5:
Dec 08 12:29:10 localhost upgrade[19164]: Traceback (most recent call last):
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/lib64/python2.7/multiprocessing/process.py", line 267, in _bootstrap
Dec 08 12:29:10 localhost upgrade[19164]:     self.run()
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
Dec 08 12:29:10 localhost upgrade[19164]:     self._target(*self._args, **self._kwargs)
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 30, in inspect_actor
Dec 08 12:29:10 localhost upgrade[19164]:     definition.load()
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 179, in load
Dec 08 12:29:10 localhost upgrade[19164]:     self._module = importer.find_module(name).load_module(name)
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/lib64/python2.7/pkgutil.py", line 243, in load_module
Dec 08 12:29:10 localhost upgrade[19164]:     mod = imp.load_module(fullname, self.file, self.filename, self.etc)
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/biosdevname/actor.py", line 2, in <module>
Dec 08 12:29:10 localhost upgrade[19164]:     from leapp.libraries.actor.biosdevname import check_biosdevname
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/lib64/python2.7/pkgutil.py", line 243, in load_module
Dec 08 12:29:10 localhost upgrade[19164]:     mod = imp.load_module(fullname, self.file, self.filename, self.etc)
Dec 08 12:29:10 localhost upgrade[19164]:   File "/usr/share/leapp-repository/repositories/system_upgrade/el7toel8/actors/biosdevname/libraries/biosdevname.py", line 3, in <module>
Dec 08 12:29:10 localhost upgrade[19164]:     import pyudev
Dec 08 12:29:10 localhost upgrade[19164]: ImportError: No module named pyudev
Dec 08 12:29:10 localhost kernel: XFS (vda1): Unmounting Filesystem
Dec 08 12:29:10 localhost upgrade[19164]: 2020-12-08 13:29:10.388 ERROR    PID: 3 leapp.repository.system_upgrade_el7toel8: Process inspecting actor in actors/biosdevname failed with 1
Dec 08 12:29:10 localhost upgrade[19164]: Error: Inspection of actor in actors/biosdevname failed
Dec 08 12:29:10 localhost upgrade[19164]: Container sysroot failed with error code 2.
Dec 08 12:29:10 localhost upgrade[19164]: writing logs to disk and rebooting