etcd: fix operator presubmit test job

[ivanvc]

Fixes the new etcd-operator presubmit test job.

Part of etcd-io/etcd-operator#21.

/cc @jmhbnz

[jmhbnz]

Thanks @ivanvc - Sorry I missed this on earlier review.

/lgtm
/approve

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This pull-request has been approved by: ivanvc, jmhbnz

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[k8s-ci-robot]

@ivanvc: Updated the job-config configmap in namespace default at cluster test-infra-trusted using the following files:

• key etcd-operator-presubmits.yaml using file config/jobs/etcd/etcd-operator-presubmits.yaml

In response to this:

Fixes the new etcd-operator presubmit test job.

Part of etcd-io/etcd-operator#21.

/cc @jmhbnz

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