Synced image num: 4 and image mapping as follow:
| gcr registry | dockerhub | tags num |
|---|---|---|
| gcr.io/kubernetes-helm/expandybird | corelab/expandybird | 4 |
| gcr.io/kubernetes-helm/manager | corelab/manager | 4 |
| gcr.io/kubernetes-helm/resourcifier | corelab/resourcifier | 4 |
| gcr.io/kubernetes-helm/tiller | corelab/tiller | 61 |