*: update etcd-operator image to v0.3.0
*: update etcd-operator image to v0.3.0

v0.3.0 supports per cluster S3 policy and dynamically change backup
policy.
This is needed for disaster recovery.

diegs/bootkube,dghubble/bootkube,hongchaodeng/bootkube,diegs/bootkube,ericchiang/bootkube,kubernetes-incubator/bootkube,dghubble/bootkube,hongchaodeng/bootkube,kubernetes-incubator/bootkube,ericchiang/bootkube,ericchiang/bootkube,hongchaodeng/bootkube,kubernetes-incubator/bootkube,dghubble/bootkube,diegs/bootkube