Provides default values for the following props if they haven't been set previously.
service_name
The name this agent uses to register with Service Manager. The WebServer's authentication_agent prop must be set to match this agent's service_name, or requests for urls requiring authentication will not be handed off to this agent. The default value is http_authentication.agent.
authentication_files
The file(s) used for authenticating requests. The default value is ./http.authentication. Separate multiple files with commas.