Update ETCD Image
Update ETCD Image

Current image marked as vunerable by vendor.  Ideally the version should be set to latest, which would allow auto-patching but that should be discussed.

See: https://quay.io/repository/coreos/etcd/image/4d3a6160f8b0a2962dccdd11e677e1a03258b4b4a1aa8f629066cf0fd0e2ab2b?tab=vulnerabilities

See: https://trello.com/c/gZ2cXr3g

alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet,alphagov/govuk-puppet