Fix kubetest2 panic inheriting env vars #11351
Merged
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Fixes
panic: runtime error: slice bounds out of range [:-1]
found here: https://prow.k8s.io/view/gs/kubernetes-jenkins/logs/e2e-kops-grid-scenario-aws-cloud-controller-manager/1387534126441041920Also fixes a logging statement to include the cluster name (empty cluster name is seen in those same logs)