s4/selftest: Move samba4.rpc.join tests to ad_dc_default_smb1

s4/selftest: Move samba4.rpc.join tests to ad_dc_default_smb1

The following tests which fail when run against a test env that
doesn't support SMB1

samba4.rpc.join on ncacn_ip_tcp with bigendian(ad_dc_default)
samba4.rpc.join on ncacn_ip_tcp with seal,padcheck(ad_dc_default)
samba4.rpc.join on ncacn_ip_tcp with validate(ad_dc_default)
samba4.rpc.join on ncacn_np with bigendian(ad_dc_default)
samba4.rpc.join on ncacn_np with seal,padcheck(ad_dc_default)
samba4.rpc.join on ncacn_np with validate(ad_dc_default)
samba4.rpc.join on ncalrpc with bigendian(ad_dc_default:local)
samba4.rpc.join on ncalrpc with seal,padcheck(ad_dc_default:local)
samba4.rpc.join on ncalrpc with validate(ad_dc_default:local)

have been moved to ad_dc_default_smb1

results verified with

VALIDATE="validate" python3 source4/selftest/tests.py | grep "^samba4.rpc.join" | grep ad_dc_default | sort

corrosponding entries have been removed from skip_smb1_fail

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Ralph Boehme <slow@samba.org>