[SSSD] [sssd PR#541][opened] memberof: keep memberOf attribute for nested member

[pbrezina]

   URL: https://github.com/SSSD/sssd/pull/541
Author: pbrezina
 Title: #541: memberof: keep memberOf attribute for nested member
Action: opened

PR body:
"""
If we have a member that is both direct and nested member,
memberOf attribute was removed if the direct membership
was deleted.

1)
user ----------> groupB -> groupC
     -> groupA /

2)
user -> groupA -> groupB -> groupC

If we remove user->groupB from 1), we get 2) but groupB was still
removed from user memberOf attribute.

Resolves:
https://pagure.io/SSSD/sssd/issue/3636
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/541/head:pr541
git checkout pr541