spec.podTemplateSpec.metadata is not persisted

[ekarlso]

When you create a GAR instance the podTemplateSpec.metadata is {}, it seems there's some controller code / CRD code that is not working properly.

kubernetes-sigs/controller-tools#448
https://github.com/minio/operator/pull/423/files
kubernetes-sigs/controller-tools#539

[davidkarlsen]

Related #203

[AmitBenAmi]

I saw that the tests should cover the error, but it still happens on my environment using the latest version (as stated in #233), with PR #221
Is it something caused by kubebuilder, or is it something specific in the controller of this operator?