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/fission-cli/cmd/timetrigger/update.go

@@ -77,8 +77,18 @@ func (opts *UpdateSubCommand) complete(input cli.Input) error {
 		updated = true
 	}
 
+	if input.IsSet(flagkey.TtMethod) {
+		tt.Spec.Method = input.String(flagkey.TtMethod)
+		updated = true
+	}
+
+	if input.IsSet(flagkey.FnSubPath) {
+		tt.Spec.Subpath = input.String(flagkey.FnSubPath)
+		updated = true
+	}
+
 	if !updated {
-		return errors.New("nothing to update. Use --cron or --function")
+		return errors.New("nothing to update. Use --cron or --function or --method or --subpath")
 	}
 
 	opts.trigger = tt