add unit tests for audit

[sozercan]

Describe the solution you'd like
looks like we don't have good test coverage there, we should add tests for audit

Anything else you would like to add:
[Miscellaneous information that will assist in solving the issue.]

Environment:

• Gatekeeper version:
• Kubernetes version: (use kubectl version):

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed in 14 days if no further activity occurs. Thank you for your contributions.

[JaydipGabani]

@sozercan Please assign this to me