Un-revert #4551 which moved the certs.sh e2e test to ginkgo and fix the

e2e auth breakage it caused. The fix is to not set project/zone/kube_master
to the empty string partway through the script, which I should have
realized was a bad idea in the first place.

hack/ginkgo-e2e.sh

@@ -106,5 +106,8 @@ fi
 "${e2e}" "${auth_config[@]:+${auth_config[@]}}" \
   --host="https://${KUBE_MASTER_IP-}" \
   --provider="${KUBERNETES_PROVIDER}" \
+  --gce_project="${PROJECT:-}" \
+  --gce_zone="${ZONE:-}" \
+  --kube_master="${KUBE_MASTER:-}" \
   ${E2E_REPORT_DIR+"--report_dir=${E2E_REPORT_DIR}"} \
   "${@:-}"