Story (Required)

As a user of Argo Rollouts on OpenShift I would like shell auto completion for the rollouts kubectl plugin to work with the oc command.  It currently does work with kubectl

Background (Required)

Enabling shell auto completion for a kubectl plugin in general is described here: https://github.com/kubernetes/enhancements/tree/master/keps/sig-cli/2379-kubectl-plugins#shell-completion-support 

This PR https://github.com/argoproj/argo-rollouts/pull/3377 describes specifically what to do to enable auto completion for the rollouts plugin.  This works for the kubectl command.

However it does not work for the oc command. This story is to investigate why.

Acceptance Criteria (Mandatory)

We have an understanding of why this isn't working and what needs to be done to fix it.

Done Checklist

• Code is completed, reviewed, documented and checked in
• Unit and integration test automation have been delivered and running cleanly in continuous integration/staging/canary environment
• Continuous Delivery pipeline(s) is able to proceed with new code included
• Customer facing documentation, API docs etc. are produced/updated, reviewed and published
• Acceptance criteria are met