fix hasLoadedNamespace for cloned instances
fix hasLoadedNamespace for cloned instances

should fix: https://github.com/i18next/i18next/issues/1413
should fix: https://github.com/i18next/i18next-express-middleware/issues/210
i18next/i18next,i18next/i18next,i18next/i18next,i18next/i18next