fix: ETCD container registry

[nic-chen]

Please answer these questions before submitting a pull request, or your PR will get closed.

Why submit this pull request?

• Bugfix
• New feature provided
• Improve performance
• Backport patches

What changes will this PR take into?

quay.io/coreos/etcd is down

uses gcr.io/etcd-development/etcd as ETCD container registry, instead of quay.io/coreos/etcd

Checklist:

• Did you explain what problem does this PR solve? Or what new features have been added?
• Have you added corresponding test cases?
• Have you modified the corresponding document?
• Is this PR backward compatible? If it is not backward compatible, please discuss on the mailing list first