need to support all of the keystone v3 auth options

[Richard Megginson]

In openstack.rb, def self.password_auth_args(credentials) should handle all of the keystone v3 authentication options specified at http://www.jamielennox.net/blog/2015/02/17/loading-authentication-plugins/

The ones that are missing are:

--os-domain-id
--os-domain-name
--os-project-id
--os-project-domain-id
--os-user-domain-id
--os-user-id
--os-trust-id
--insecure
--os-cacert
--os-cert
--os-key

not sure if --timeout needs to be specified as openstack.rb already handles timeouts/retries.

I would also like the code to use if credentials['value'] instead of credentials.include?('value'). The reason is that it simplifies the client code. For example, glance has to do this now:

if config['user_domain_name']
  credentials['user_domain_name'] = config['user_domain_name']
end

rather than just

credentials['user_domain_name'] = config['user_domain_name']

Because the credentials.include?('value') will be true even if the value is nil

[Emilien Macchi (emilienm)]

closed as wontfix since it has been superseded by the new auth restructure code