CVE-2022-37966 python:tests/krb5: add 'force_nt4_hash' for account creation of KDCBas...

CVE-2022-37966 python:tests/krb5: add 'force_nt4_hash' for account creation of KDCBaseTest

This will allow us to create tests accounts with only an nt4 hash
stored, without any aes keys.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15237

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Joseph Sutton <josephsutton@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>
(cherry picked from commit 77bd3258f1db0ddf4639a83a81a1aad3ee52c87d)

[jsutton@samba.org Fixed conflicts in parameters]