PLT-3456 Fix Errors while starting the server (#3445)

* PLT-3456 AppErrors that are triggered before translations are loaded crash server or produce bad error messages.

* Fixing tests

utils/config_test.go

@@ -8,6 +8,7 @@ import (
 )
 
 func TestConfig(t *testing.T) {
+	TranslationsPreInit()
 	LoadConfig("config.json")
 	InitTranslations(Cfg.LocalizationSettings)
 }

utils/i18n.go

@@ -15,9 +15,16 @@ var T i18n.TranslateFunc
 var locales map[string]string = make(map[string]string)
 var settings model.LocalizationSettings
 
+// this functions loads translations from filesystem
+// and assign english while loading server config
+func TranslationsPreInit() {
+	InitTranslationsWithDir("i18n")
+	T = TfuncWithFallback("en")
+}
+
 func InitTranslations(localizationSettings model.LocalizationSettings) {
 	settings = localizationSettings
-	InitTranslationsWithDir("i18n")
+	T = GetTranslationsBySystemLocale()
 }
 
 func InitTranslationsWithDir(dir string) {
@@ -30,8 +37,6 @@ func InitTranslationsWithDir(dir string) {
 			i18n.MustLoadTranslationFile(i18nDirectory + filename)
 		}
 	}
-
-	T = GetTranslationsBySystemLocale()
 }
 
 func GetTranslationsBySystemLocale() i18n.TranslateFunc {

utils/mail.go

@@ -79,14 +79,14 @@ func TestConnection(config *model.Config) {
 
 	conn, err1 := connectToSMTPServer(config)
 	if err1 != nil {
-		l4g.Error(T("utils.mail.test.configured.error"), err1.Message, err1.DetailedError)
+		l4g.Error(T("utils.mail.test.configured.error"), T(err1.Message), err1.DetailedError)
 		return
 	}
 	defer conn.Close()
 
 	c, err2 := newSMTPClient(conn, config)
 	if err2 != nil {
-		l4g.Error(T("utils.mail.test.configured.error"), err2.Message, err2.DetailedError)
+		l4g.Error(T("utils.mail.test.configured.error"), T(err2.Message), err2.DetailedError)
 		return
 	}
 	defer c.Quit()