prow: hook failure to unmarshal config

[nlandolfi]

Error logs from hook:

// ...
{"error":"error unmarshaling /etc/config/config: error converting YAML to JSON: yaml: line 202: did not find expected key","level":"error","msg":"Error loading config.","path":"/etc/config/config","time":"2017-07-24T16:26:00Z"}
// ...

[nlandolfi]

Here name shouldn't have a hyphen and should have same indentation level as period.

[nlandolfi]

For k8s periodics reference, see here