Refactoring cfg refs and load / save functions (#7749)

* refactoring cfg refs and load / save functions

* improve error output

app/app_test.go

@@ -16,20 +16,15 @@ import (
 
 func TestMain(m *testing.M) {
 	flag.Parse()
+	utils.TranslationsPreInit()
 
 	// In the case where a dev just wants to run a single test, it's faster to just use the default
 	// store.
 	if filter := flag.Lookup("test.run").Value.String(); filter != "" && filter != "." {
-		utils.TranslationsPreInit()
-		utils.LoadConfig("config.json")
 		l4g.Info("-test.run used, not creating temporary containers")
 		os.Exit(m.Run())
 	}
 
-	utils.TranslationsPreInit()
-	utils.LoadConfig("config.json")
-	utils.InitTranslations(utils.Cfg.LocalizationSettings)
-
 	status := 0
 
 	container, settings, err := storetest.NewMySQLContainer()