fix builtin plugin http router (#7797)

app/app.go

@@ -93,6 +93,7 @@ func New(options ...Option) *App {
 	app.Srv.Store = app.newStore()
 	app.initJobs()
 
+	app.initBuiltInPlugins()
 	app.Srv.Router.HandleFunc("/plugins/{plugin_id:[A-Za-z0-9\\_\\-\\.]+}", app.ServePluginRequest)
 	app.Srv.Router.HandleFunc("/plugins/{plugin_id:[A-Za-z0-9\\_\\-\\.]+}/{anything:.*}", app.ServePluginRequest)
 

app/plugins.go

@@ -249,7 +249,7 @@ func (api *BuiltInPluginAPI) I18n(id string, r *http.Request) string {
 	return f(id)
 }
 
-func (a *App) InitBuiltInPlugins() {
+func (a *App) initBuiltInPlugins() {
 	plugins := map[string]builtinplugin.Plugin{
 		"jira":       &jira.Plugin{},
 		"ldapextras": &ldapextras.Plugin{},