selftest: Run smbtorture3 SHORTNAME-TEST without unix extensions

selftest: Run smbtorture3 SHORTNAME-TEST without unix extensions

Soon cli_list() will change to SMB_FIND_FILE_UNIX_INFO2 which does not
provide a shortname. For now we lose that as an encrypted test, as for
now it's a SMB1 test which requires unix extensions for
encryption. Hopefully we don't forget to reenable this once the test
is converted to SMB2

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Jeremy Allison <jra@samba.org>
nonunix