selftest: Merge alternate error codes into backupkey from backupkey_heimdal
This is from
cea4a4b9b22c78f9736e2290d302a88644db4031 and
613d085a63ee554084cb99d2150921dd108f6b77
BUG: https://bugzilla.samba.org/show_bug.cgi?id=12107
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Stefan Metzmacher <metze@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Aug 3 21:43:21 CEST 2016 on sn-devel-144
(cherry picked from commit
065dcc8a45fa77b00355b61a8f25d046c9d349cf)