audit_logging: auth_json_audit required auth_json

audit_logging: auth_json_audit required auth_json

To log JSON the human-readable logs must also have been enabled

BUG: https://bugzilla.samba.org/show_bug.cgi?id=13715

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Gary Lockyer <gary@catalyst.net.nz>
Autobuild-User(master): Andrew Bartlett <abartlet@samba.org>
Autobuild-Date(master): Fri Dec 14 14:32:25 CET 2018 on sn-devel-144

(cherry picked from commit 31957c7fe9d0f67bef08177e982043a23b172c7d)

Edited to apply to y4.9: Gary Lockyer <gary@catalyst.net.nz>