Fix test-frame examples on openshift

[kornys]

Description

Fix examples to run on openshift. since ocp 4.16 nginx image in test examples is supposed to run with priveledges which is not by default supported. So I have to switch to non root user image which works fine.

Type of Change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit/integration tests pass locally with my changes