Changes to Update engine

the settings request property default value changed from {} to {"use_case":"generic_ap"}

the settings response's property default value changed from {} to {"use_case":"generic_ap"} for the status 200

added the optional property allOf[subschema #1: Engine object]/created_at to the response with the 200 status

added the optional property allOf[subschema #1: Engine object]/created_by to the response with the 200 status

added the optional property allOf[subschema #1: Engine object]/modified_at to the response with the 200 status

added the optional property allOf[subschema #1: Engine object]/modified_by to the response with the 200 status

the response's body type changed from object to no type for status 200

removed the optional property agenda_id from the response with the 200 status

removed the optional property description from the response with the 200 status

removed the optional property id from the response with the 200 status

removed the optional property learning_enabled from the response with the 200 status

removed the optional property name from the response with the 200 status

removed the optional property organization from the response with the 200 status

removed the optional property training_queues from the response with the 200 status

removed the optional property type from the response with the 200 status

removed the optional property url from the response with the 200 status

added the new optional request property settings

added engine_base subschema #2 to the response body allOf list for the response status 200