LDAP: Netgroups refresh in background task
refresh_expired_interval config value spawns be_task
responsible for refreshing expired cache entries
in background.
Netgroup related entries are stored in persistent
cache rather than timestamp cache. After sdap_refresh_step()
has been replaced by generic be_refresh_step()
lookup routine was searching for entries only in
timestamp cache. This result in LDAP netgroup entries
not refreshing in background.
Resolves:
https://pagure.io/SSSD/sssd/issue/4177
Reviewed-by: Jakub Hrozek <jhrozek@redhat.com>