Checkmk Werk 13410: KUBE: Adapt kubernetes labels to Checkmk's labelling requirements

ID: 13410 Title: KUBE: Adapt kubernetes labels to Checkmk's labelling requirements Component: Checks & agents Level: 1 Class: Bug fix Version: 2.2.0i1 Kubernetes labels can have empty strings as values for labels (for example <tt>node-role.kubernetes.io/control-plane:</tt>). In checkmk labels can not have an empty value. In order to have valid labels in checkmk, empty labels values are replaced with <tt>true</tt>.