Add method and subpath flags to timetrigger object for triggering a function (#3017)

* Update timetrigger crd and add method and subpath fields in spec.
Update fission-cli to accept user input for method and subpath fields.
Update publisher package to utilize these fields for triggering a function.
Update timer controller to use method and subpath fields for publishing a request.
Add a new test TestPublisherSubpath in pulisher package.

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

* Use kubebuilder default annotation.
Update test for fission-cli timetrigger create, update command to support method and subpath flags.

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

---------

Signed-off-by: Md Soharab Ansari <soharab.ansari@infracloud.io>

pkg/timer/timer.go

@@ -57,6 +57,7 @@ func MakeTimer(logger *zap.Logger, publisher publisher.Publisher) *Timer {
 }
 
 func (timer *Timer) newCron(t fv1.TimeTrigger) *cron.Cron {
+	target := utils.UrlForFunction(t.Spec.FunctionReference.Name, t.Namespace) + t.Spec.Subpath
 	c := cron.New(
 		cron.WithParser(
 			cron.NewParser(
@@ -69,7 +70,7 @@ func (timer *Timer) newCron(t fv1.TimeTrigger) *cron.Cron {
 		// with the addition of multi-tenancy, the users can create functions in any namespace. however,
 		// the triggers can only be created in the same namespace as the function.
 		// so essentially, function namespace = trigger namespace.
-		(*timer.publisher).Publish(context.Background(), "", headers, utils.UrlForFunction(t.Spec.FunctionReference.Name, t.Namespace))
+		(*timer.publisher).Publish(context.Background(), "", headers, t.Spec.Method, target)
 	})
 	c.Start()
 	timer.logger.Info("started cron for time trigger", zap.String("trigger_name", t.Name), zap.String("trigger_namespace", t.Namespace), zap.String("cron", t.Spec.Cron))