Fix certificaterequest controller group test

[jknipper]

cert-manager is creating certificaterequests without a group set in issuerRef for self-signed certificates and digicert-issuer is messing up those requests.
cc @auhlig @kayrus

[jknipper]

I guess this is also related to #9

[kayrus]

Please hold on with this. There was a reason why we haven't modified this earlier (see #8). I just need some time to remember why.
Also, why haven't we faced this problem earlier?

[jknipper]

Using self-signed certificates is a newer use case I guess. And maybe also the group got removed from issuerRef in recent versions because there is only the cert-manager one?

[kayrus]

@jknipper I'm confused. What is a connection between self-signed certs and digicert signed certs?

[jknipper]

The digicert-issuer is mangling statuses of the certificate requests for self-signed certs and breaks them. I think this is just a bug and shouldn't affect the digicert stuff.

[Nuckal777]

Also, why haven't we faced this problem earlier?

At least I've encountered the issue weeks ago already, but learned about looking CertificateRequests only this week.

[kayrus]

ok, let's give it a try and test in qa env. fingers crossed that this won't cause any issues.