StatefulSet / Pod labels are not correct

[krangerich]

The Dragonfly CRD has a section spec.labels. These labels are supposed to be copied to each dragonfly pod.

Unfortunately, this does not work for the following labels:
app.kubernetes.io/name
app.kubernetes.io/part-of

The value of these labels on the StatefulSet (and therefore the pods) are currenly hardcoded to dragonfly.

All labels specified by spec.labels should be copied correctly to all resources. Hardcoded defaults should not be used, if they are overridden by spec.labels.

[Abhra303]

Hi @krangerich, feel free to open a PR. Should be a small change.