Skipping etcd certs checks when Kine is used

[makhov]

The regression in the v0.9.5 is fixed.

We don't check for etcd certs if KineDataSourceURL is not an empty string. But currently it doesn't work with KineDataSourceSecretName. We do the following to make it work, but by mistake, we pass kmc not by reference and this doesn't change the KineDataSourceURL and the check works wrongly

if kmc.Spec.KineDataSourceSecretName != "" {
    kmc.Spec.KineDataSourceURL = kineDataSourceURLPlaceholder
}

[jnummelin]

I don't get how this fixes the issue, maybe bit more explanation on the commit message might help

[makhov]

Added a comment