Prometheus can't scrape the endpoint because of the ever changing pod IP

When using secure installations, and your own certificates, Prometheus will fail the scrapping because the pod IP was not in the original CSR.

The error on Prometheus looks like this:

```
Get https://10.6.26.160:8080/_status/vars: x509: certificate is valid for 127.0.0.1, not 10.6.26.160
```

I propose #36 to fix the problem.

Jira issue: HELM-38

Start by reading the proposed fix in issue #36 and reviewing how the secure installation handles certificates for the Prometheus endpoint. Use the shown x509 error and changing pod IP scenario to verify the behavior. Done means Prometheus can scrape the endpoint without certificate validation failing for the pod IP.

Written by the indexing model from the issue text.