Add tasks.systemd_daemon_reload()

systemd daemon must be reloaded after a config file is added, changed,
or removed. Provide a common API endpoint in ipaplatform.tasks.

Related: https://pagure.io/freeipa/issue/7860
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipaserver/install/ipa_restore.py

@@ -451,7 +451,7 @@ class Restore(admintool.AdminTool):
                 oddjobd.start()
                 http.remove_httpd_ccaches()
                 # have the daemons pick up their restored configs
-                run([paths.SYSTEMCTL, "--system", "daemon-reload"])
+                tasks.systemd_daemon_reload()
         finally:
             try:
                 os.chdir(cwd)