[SSSD] [sssd PR#361][opened] Add root (user, group, uid and gid) to the negative cache (backport to sssd-1-14)

[fidencio]

   URL: https://github.com/SSSD/sssd/pull/361
Author: fidencio
 Title: #361: Add root (user, group, uid and gid) to the negative cache (backport to
sssd-1-14)
Action: opened

PR body:
"""
Some patches have been dropped from the original series as those touched files/functions
that are not present in sssd-1-14.
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/361/head:pr361
git checkout pr361