Changes to Admin Create Node

added the new optional request property hostname

added the new optional request property proxy_scheme

added the new optional request property is_bridge

the request property api_secret became optional

the request property api_url became optional

request property api_secret list-of-types was widened by adding types null to media type application/json

request property api_url list-of-types was widened by adding types null to media type application/json