Instantiate NS NBI support

• Preconditions:
  • NS instance is NOT_INSTNANTIATED state
  • SOL007 NS packages are stored in ETSI Catalog Manager.
  • the Cli-based SO NFVO Client is ready to send the SOL005-compliant Instantiate NS request
  • The SO-NFVO (so-etsi-nfvo) pod is ready

• Supports the SOL005-compliant Instantiate NS API 
  • Supports Instantiate NS request API: POST /api/nslcm/v1/ns_instances/{nsInstanceId}/instantiate (InstantiateNsRequest)
  • Supports responses 202 Accepted with an empty payload body

• • • Returns a dummy 202 until the backend business logic is ready 
  • Supports NS Lifecycle Operation Occurrence Notification
    • Use a Location HTTP header that points to the new individual NS Lifecycle Operation Occurrence resource; i.e. the URI of that resource (.../ns_lcm_op_occs/{nsLcmOpOccId}
    • Supports the Sends nsLcmOperationOccurrenceNotifiation (start, result) notification operation until the result status becomes COMPLETED
  • Optionally, Instantiate NS operations uses the GET individual NS LCM operation occurrence request and response
  • Error handling: if the operation is failed, error information is provided in the notification message

Note: secure communication is handled by a separate user story, SO-3165.