Compactor didnt respect days as units for retention policies

[Ultrafenrir]

Describe the bug
When i try to set retention for compactor for example for 30d, the following error occurring:

E1028 11:06:51.065884 807 reflector.go:178] pkg/mod/k8s.io/client-go@v0.18.6/tools/cache/reflector.go:125: Failed to list *v1alpha1.ObjectStore: v1alpha1.ObjectStoreList.Items: []v1alpha1.ObjectStore: v1alpha1.ObjectStore.Spec: v1alpha1.ObjectStoreSpec.Compactor: v1alpha1.Compactor.RetentionResolution5m: RetentionResolution1h: unmarshalerDecoder: time: unknown unit d in duration 30d, error found in #10 byte of ...|n1h":"30d","retentio|..., bigger context ...|or-iam-eks-sbx-eu"}},"retentionResolution1h":"30d","retentionResolution5m":"30d","retentionResolutio|... 28/10/2020 13:07:39

Steps to reproduce the issue:
Set any of retentionResolution1h/retentionResolution5m/retentionResolutionraw as 30d

Expected behavior
It should respect any units ( hours, days, years)

Additional context
working with hours (h)

[viennaa]

Just dug a little bit into this, the behaviour is expected by the metav1.Duration used from Go here.

Citing the possible units
Valid time units are "ns", "us" (or "µs"), "ms", "s", "m", "h".

I would close this, as it is not a bug. Maybe the documentation could be improved a litte instead.