Checkmk Werk 13931: wrong labels not raising errors in the REST API

ID: 13931 Title: wrong labels not raising errors in the REST API Component: Core & setup Level: 1 Class: Bug fix Version: 2.2.0i1 Previously when trying to set an invalid "labels" value when creating or updating a host through the REST API, the error did not occur and a 200 OK response would be returned. The value would not be set though. This werk fixes this problem.