Resolve "Add an option to send gNMI Subscribe requests via SBI"

Description

#227 (closed)

controller/interfaces/networkdomain/pnd.go

@@ -34,4 +34,5 @@ type NetworkDomain interface {
 	GetChange(uuid.UUID) (change.Change, error)
 	Commit(uuid.UUID) error
 	Confirm(uuid.UUID) error
+	SubscribePath(uuid.UUID, *ppb.SubscriptionList) error
 }