samba3.blackbox.smbclient_s3.NT1.plain &
samba3.blackbox.smbclient_s3.NT1.sign tests will fail running against
test envs ad_member & nt4_member (because those envs don't support SMB1)
However we do have some coverage with nt4_dc_smb1_done
We could maybe just delete these tests for those environments for
the moment just create specific knownfail entries and remove associated
entries from skip_smb1_fail
Signed-off-by: Noel Power <noel.power@suse.com> Reviewed-by: Ralph Boehme <slow@samba.org>