[issue 136] - Adding a specific e2e script for the OpenShift CI periodic prow job (and minor fixes/cleanup)

[fabiobrz]

Description

Fix #136

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change
• [x] Chore (non-breaking change which doesn't affect codebase; test, version modification, documentation, etc.)

Checklist

• [x] Code contributed by me aligns with current project license: Apache 2.0
• [x] Pull Request contains a description of the changes
• [x] Pull Request does not include fixes for multiple issues/topics
• [x] Code is self-descriptive and/or documented
• [ ] I have implemented unit tests to cover my changes
• [ ] I tested my code in OpenShift

[fabiobrz]

Once https://github.com/openshift/release/pull/48388 is merged and CI checks are green here, we can merge this safely.

[fabiobrz]

/retest

[fabiobrz]

/retest

[fabiobrz]

/retest

[tommaso-borgato]

/lgtm