fix missing awkenvsubst when using kustomize based deployment

Presentation

This MR will add support for variable substitution for kustomization based deployments. This will unify the raw kubernetes manifest deployment and kustomization based deployments.

Fixes #47 (closed)

Checklist

• Documented:
  • README.md reflects any job, variable or whichever visible change
  • kicker.json reflects any job, variable or whichever visible change
• Tested & examplified:
  • (url to a project sample successfully proving the merge request fixes the issue)