Cleanup test output

example.go

// Replacement for https://github.com/elastic/cloud-on-k8s/blob/master/test/e2e/cmd/run/run.go#L346-L365

	var f *os.File
	if h.logToFile {
		f, err = os.Create(testsLogFile)
		if err != nil {
			log.Error(err, "Can't create file for test output")
			return
		}
		defer f.Close()
	}

	scanner := bufio.NewScanner(stream)
	for scanner.Scan() {
		text := scanner.Text()
		fmt.Println(text)
		if h.logToFile {
			err = json.Unmarshal([]byte(text), &GoTestJSON{})
			if err == nil {
				f.WriteString(text)
				f.WriteString("\n")
			}
		}
	}