console certificate subject alt names

Starting cluster like:
```
export OC_CLUSTER_PUBLIC_HOSTNAME=`hostname`
/root/oc-cluster-wrapper/oc-cluster up --version=latest
```

The generated console web server certificate is setup only for the local IP address. It needs to have SubjecAltNames field with the IP and the hostname of the machine such that certificate can be trusted in Firefox and Chrome which require SunjectAltName now. 