[SSSD] [sssd PR#519][opened] DEBUG: Print simple access provider allow and deny lists

[justin-stephenson]

   URL: https://github.com/SSSD/sssd/pull/519
Author: justin-stephenson
 Title: #519: DEBUG: Print simple access provider allow and deny lists
Action: opened

PR body:
"""
Prior to this PR, debug level 9 logs do not print the simple allow and deny user or group
lists that are checked against during simple access checks when `access_provider =
simple`

These debug statements helped to solve a downstream customer case where
`simple_allow_users` was not working as expected, the administrator discovered when they
saw the usernames printed in the logs that the `simple_allow_users` list was coming from a
**/etc/sssd/conf.d/alternate.conf** file which was overriding what they set in
**/etc/sssd/sssd.conf**.
"""

To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/519/head:pr519
git checkout pr519