Remove the "name" label requirement on StatefulSet's pods

[pracucci]

The rollout-operator currently requires that each pod controlled by a StatefulSet managed by rollout-operator has the name label and its value is the name of the StatefulSet controlling it:

rollout-operator/pkg/controller/controller.go

Line 402 in a546f4e

mustNewLabelsRequirement("name", selection.Equals, []string{sts.Spec.Template.Labels["name"]}),

I think we can get rid of this requirement, looking for the StatefulSet controlling the pod in a different way. For example, when running kubectl describe pod ... it shows a "Controlled By" field with the name of the StatefulSet controlling it.

[FUSAKLA]

Just bumped into this, It would be great to at least document it in the README until this gets resolved. This way, I had to dig into the code to make it work.

#17

[bboreham]

I believe that's done via the ownerReferences field.