lib: auth: Store the netlogon_creds_cli_global_db pointer on the NULL context.

lib: auth: Store the netlogon_creds_cli_global_db pointer on the NULL context.

Now we shutdown correctly it doesn't need the talloc_autofree_context().

Last use of talloc_autofree_context() ourside the talloc test code !

Please don't add it ever again :-).

BUG: https://bugzilla.samba.org/show_bug.cgi?id=12932

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Thu Jul 27 01:34:12 CEST 2017 on sn-devel-144