WHY
Currently the system-app PreHook and PostHook is missing some of the functionality that it had when 3scale-operator used DeploymentConfigs.

WHAT
The .spec.image field of a Job is immutable so the operator is unable to update the Jobs to use new versions of the porta image.

HOW
Investigate using an InitContainer for the PreHook Job and a LifecycleHandler for the PostHook job. Continue to use Jobs for the PreHook and PostHook but refactor the reconciler to delete and recreate the Jobs whenever there is an image change.