s3-auth set session_info->sanitized_username in create_local_token()

s3-auth set session_info->sanitized_username in create_local_token()

Rather than passing this value around the callers, and eventually
setting it in register_existing_vuid(), we simply pass it to
create_local_token().  This also removes the need for
auth_ntlmssp_get_username().

Andrew Bartlett

Signed-off-by: Andrew Tridgell <tridge@samba.org>