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

* refactoring cfg refs and load / save functions

* improve error output

store/sqlstore/store_test.go

@@ -99,8 +99,6 @@ func tearDownStores() {
 
 func TestMain(m *testing.M) {
 	utils.TranslationsPreInit()
-	utils.LoadConfig("config.json")
-	utils.InitTranslations(utils.Cfg.LocalizationSettings)
 
 	status := 0