Support for OpenShift 4.2+ in example configuration.

**Is your feature request related to a problem? Please describe.**

The example OpenShift template in the `openshift3` directory will work for OpenShift 3.X and 4.1, but will not work for 4.2, as support for older obsolete non namespaced resources have been removed in 4.2.

**Describe the solution you'd like**

The template needs to be updated with correct namespaces ``apiVersion`` for resources which OpenShift 4.2+ requires. After the changes, it will still work for OpenShift 3.11 as older version already supported the proper namespaces for ``apiVersion``. Not sure how far back in 3.X will work, possible 3.9, but maybe older.

**Describe alternatives you've considered**

No alternatives.

**Additional context**

The correct namespaces to use for resources can be determined by running ``oc api-resources``.