Checkmk Werk 15381: Host Tag can now be "null" in REST API responses

ID: 15381 Title: Host Tag can now be "null" in REST API responses Component: REST API Level: 1 Class: Bug fix Version: 2.2.0i1 The REST API can now return "null" values for host tags. Previously, the inclusion of "null" in the allowed enums broke the validation. This werk fixes this "null" bug.