docs: update connection for the openstack provider (#6776)

The option `username` does not work. Need to use user_name with underscore

> Authentication failed: Exactly one of Username and UserID must be provided for password authentication

The option `user_name` works, however, it's need to use `region`, `domain_name` in additional.
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Aleksey Stepanenko 2020-02-18 16:06:34 +03:00 committed by GitHub
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@ -244,8 +244,11 @@ $ consul agent -retry-join "provider=os tag_key=consul tag_value=server username
- `provider` (required) - the name of the provider ("os" in this case).
- `tag_key` (required) - the key of the tag to auto-join on.
- `tag_value` (required) - the value of the tag to auto-join on.
- `domain_name` (optional) - the name of the domain.
- `domain_id` (optional) - the id of the domain.
- `project_id` (optional) - the id of the project (tenant id).
- `username` (optional) - the username to use for auth.
- `region` (optional) - the name of the region.
- `user_name` (optional) - the username to use for auth.
- `password` (optional) - the password to use for auth.
- `token` (optional) - the token to use for auth.
- `auth_url` (optional) - the identity endpoint to use for auth.