Server-Side Apply now a first-class citizen in the JOSDK framework and the default approach for patching the status resource.
The Fabric8 KubernetesClient mock server currently does not support Server-Side Apply, resulting in an UnsupportedMediaType error during unit tests.
See the following issue: fabric8io/kubernetes-client#5337
After migrating to JOSDK v5 (currently underway with PR #93), we should implement Server-Side Apply functionality and introduce proper support for unit testing this feature.