fix language test

Ideally we would use a copy of the dashboard, either way we kinda have
to rely on repo layouts to find it

src/paths.js

@@ -16,7 +16,7 @@ exports = module.exports = {
 
     CLOUDRON_DEFAULT_AVATAR_FILE: path.join(__dirname + '/../assets/avatar.png'),
     INFRA_VERSION_FILE: path.join(baseDir(), 'platformdata/INFRA_VERSION'),
-    DASHBOARD_DIR: path.join(baseDir(), 'box/dashboard/dist'),
+    DASHBOARD_DIR: constants.TEST ? path.join(__dirname, '../../dashboard/src') : path.join(baseDir(), 'box/dashboard/dist'),
 
     PROVIDER_FILE: '/etc/cloudron/PROVIDER',