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

* refactoring cfg refs and load / save functions

* improve error output

api/apitestlib.go

@@ -64,12 +64,6 @@ func StopTestStore() {
 }
 
 func setupTestHelper(enterprise bool) *TestHelper {
-	if utils.T == nil {
-		utils.TranslationsPreInit()
-	}
-	utils.LoadConfig("config.json")
-	utils.InitTranslations(utils.Cfg.LocalizationSettings)
-
 	var options []app.Option
 	if testStore != nil {
 		options = append(options, app.StoreOverride(testStore))
@@ -80,9 +74,11 @@ func setupTestHelper(enterprise bool) *TestHelper {
 	}
 	th.originalConfig = th.App.Config().Clone()
 
-	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.TeamSettings.MaxUsersPerTeam = 50 })
-	th.App.UpdateConfig(func(cfg *model.Config) { *cfg.RateLimitSettings.Enable = false })
-	th.App.UpdateConfig(func(cfg *model.Config) { cfg.EmailSettings.SendEmailNotifications = true })
+	th.App.UpdateConfig(func(cfg *model.Config) {
+		*cfg.TeamSettings.MaxUsersPerTeam = 50
+		*cfg.RateLimitSettings.Enable = false
+		cfg.EmailSettings.SendEmailNotifications = true
+	})
 	utils.DisableDebugLogForTest()
 	prevListenAddress := *th.App.Config().ServiceSettings.ListenAddress
 	if testStore != nil {