Network type OpenShiftSDN is deprecated

[dchourasia]

We have suddenly started getting error while provisioning openshift clusters using OSIA.
ERROR failed to fetch Metadata: failed to load asset "Install Config": failed to create install config: invalid "install-config.yaml" file: networking.networkType: Invalid value: "OpenShiftSDN": networkType OpenShiftSDN is deprecated, please use OVNKubernetes

Seems like network-type "OpenShiftSDN" is hardcoded in the install-config-jinja templates with no way to override https://github.com/redhat-cop/osia/blob/devel/osia/installer/templates/install-config-base.yaml.jinja2#L43