Goal

Allow to point to an existing OVA image stored in vSphere from the OpenShift installer, replacing the current method that uploads the OVA template every time an OpenShift cluster is installed.

Why is this important?

This is an improvement that makes the installation more efficient by not having to upload an OVA from where openshift-install is running every time a cluster is installed, saving time and bandwidth use. For example if an administrating is installing from a VPN then the OVA is upload through it to the target cluster every time an OpenShift cluster is installed. This makes the administration process more efficient by having a OVA centralised ready to use to install new clusters without uploading it from where the installer is run.