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

Description

#227 (closed)

cli/adapter/PndAdapter.go

@@ -127,6 +127,8 @@ func (p *PndAdapter) Request(ctx context.Context, did uuid.UUID, path string) (*
 	return resp, nil
 }
 
+// SubscribeONDPath sends an API call to the controller requesting to subscribe
+// to a specific path of a specifc device
 func (p *PndAdapter) SubscribeONDPath(ctx context.Context, did uuid.UUID, slist *ppb.SubscriptionList) (ppb.PndService_SubscribePathClient, error) {
 	resp, err := api.SubscribePath(ctx, p.endpoint, p.id.String(), did.String(), slist)
 	if err != nil {