Description of problem:
Customer is using properly defined custom repositories, the preugprade begins but fails early due to a missing /var/lib/leapp/el8userspace/etc/yum.repos.d.
Removing the directory and trying again does not help.

Version-Release number of selected component (if applicable):
0.16

How reproducible:
Always for the customer, unable to reproduce internally.

Steps to Reproduce:
1. Define custom HTTP repositories for el7 in /etc/yum.repos.d and custom HTTP repos for el8 in /etc/leapp/files/leapp_upgrade_repositories.repo
2. Execute leapp by enabling those custom el8 repos and disable rhsm

Actual results:
Traceback (most recent call last):
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 258, in _bootstrap
    self.run()
  File "/usr/lib64/python2.7/multiprocessing/process.py", line 114, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/repository/actor_definition.py", line 72, in _do_run
    actor_instance.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 335, in run
    self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/actor.py", line 52, in process
    userspacegen.perform()
  File "/usr/lib/python2.7/site-packages/leapp/utils/deprecation.py", line 42, in process_wrapper
    return target_item(*args, **kwargs)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 681, in perform
    _create_target_userspace(context, indata.packages, indata.files, target_repoids)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 655, in _create_target_userspace
    _prep_repository_access(context, target_path)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 246, in _prep_repository_access
    files_owned_by_rpms = _get_files_owned_by_rpms(target_context, '/etc/yum.repos.d')
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py", line 214, in _get_files_owned_by_rpms
    for fname in os.listdir(context.full_path(dirpath)):
OSError: [Errno 2] No such file or directory: '/var/lib/leapp/el8userspace/etc/yum.repos.d'

Additional info:
- I didn't find anything in the logs or even in the strace which could explain this:
13463 16:48:04.672460 openat(AT_FDCWD, "/var/lib/leapp/el8userspace/etc/yum.repos.d", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = -1 ENOENT (No such file or directory) <0.000009>

- Creating the directory in question and copying the repo file workarounds the issue:
In `/usr/share/leapp-repository/repositories/system_upgrade/common/actors/targetuserspacecreator/libraries/userspacegen.py`, at the beginning of _get_files_owned_by_rpms(), adding these lines before the error occurs:

    if dirpath == "/etc/yum.repos.d":
        api.current_logger().debug('RECREATING YUM.REPOS.D')
        run(['cp', '-rf', '/etc/yum.repos.d', '/var/lib/leapp/el8userspace/etc/'])
        run(['cp', '-f', '/etc/leapp/files/leapp_upgrade_repositories.repo', '/var/lib/leapp/el8userspace/etc/yum.repos.d/'])