tests/krb5: Allow KRB5KDC_ERR_S_PRINCIPAL_UNKNOWN for a missing sname
This allows our code to still pass with the error code that
MIT and Heimdal have chosen
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14770
BUG: https://bugzilla.samba.org/show_bug.cgi?id=14817
Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Andreas Schneider <asn@cryptomilk.org>
Autobuild-Date(master): Thu Sep 2 14:28:31 UTC 2021 on sn-devel-184
(cherry picked from commit
10baaf08523200e47451aa1862430977b0365b59)