Automatic merge from submit-queue

Adding default StorageClass annotation printout for resource_printer and describer and some refactoring

adding ISDEFAULT for _kubectl get storageclass_ output

```
[root@screeley-sc1 gce]# kubectl get storageclass
NAME            TYPE                   ISDEFAULT
another-class   kubernetes.io/gce-pd   NO        
generic1-slow   kubernetes.io/gce-pd   YES       
generic2-fast   kubernetes.io/gce-pd   YES       
```

```release-note
Add ISDEFAULT to kubectl get storageClass output
```

@kubernetes/sig-storage