Validate parameters of huaweicloudstack provider

[ShiChangkuo]

add the follow rules:

• user_name and user_id are alternative;
• domain_name and domain_id are alternative;
• domain_name and domain_id can not be set together with user_id;
• only one of thepassword and tokencan be specified;
• one of user_name, user_id must be specified together with password;
• one of domain_name and domain_id must be specified together with tenant_name in password mode;
• mark access_key and secret_key deprecated as the provider doesn't support AKSK;