Use timezone from config

pkg/models/task_collection_test.go

@@ -17,11 +17,11 @@
 package models
 
 import (
+	"code.vikunja.io/api/pkg/config"
 	"code.vikunja.io/api/pkg/db"
 	"code.vikunja.io/api/pkg/files"
 	"code.vikunja.io/api/pkg/user"
 	"code.vikunja.io/web"
-	"github.com/stretchr/testify/assert"
 	"gopkg.in/d4l3k/messagediff.v1"
 	"testing"
 	"time"
@@ -53,8 +53,7 @@ func TestTaskCollection_ReadAll(t *testing.T) {
 		Updated:  testUpdatedTime,
 	}
 
-	loc, err := time.LoadLocation("GMT")
-	assert.NoError(t, err)
+	loc := config.GetTimeZone()
 
 	// We use individual variables for the tasks here to be able to rearrange or remove ones more easily
 	task1 := &Task{