test_smb: test that we can auth as NetBIOS alias
cifs/... principal on SMB server side has NetBIOS name of the SMB server
as its alias. Test that we can actually initialize credentials using
this alias. We don't need to use it anywhere in Samba, just verify that
alias works.
Related: https://pagure.io/freeipa/issue/8291
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>