Leapp Upgrade of Red Hat Satellite 6 fails with traceback error CalledProcessError: Command ['/sbin/efibootmgr', '-n', u'0004'] failed with exit code 13.

Issue

• In-place upgrade of Red Hat Satellite 6 server from RHEL-7 to RHEL-8 fails with Traceback Error as below.

  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 74, in _do_run
  actor_instance.run(*args, **kwargs)
  File "/usr/lib/python2.7/site-packages/leapp/actors/__init__.py", line 289, in run
  self.process(*args)
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/actors/efibootorderfix/interim/actor.py", 
  line 17, in process
  efi_reboot_fix.maybe_emit_updated_boot_entry()
  File "/usr/share/leapp-repository/repositories/system_upgrade/common/libraries/efi_reboot_fix.py", line 47, in 
  maybe_emit_updated_boot_entry
  run(['/sbin/efibootmgr', '-n', current_boot])
  File "/usr/lib/python2.7/site-packages/leapp/libraries/stdlib/__init__.py", line 192, in run
  result=result
  CalledProcessError: Command ['/sbin/efibootmgr', '-n', u'0004'] failed with exit code 13.