WHY
Now that DeploymentConfigs are deprecated, we need to convert the system DCs to Deployments.

WHAT

• system-app
  NOTE: the system-app DeploymentConfig makes use of lifecycle hooks to bootstrap the system database. Unfortunately, Deployments don't support lifecycle hooks so we will need a different mechanism to provide the equivalent functionality. We can't use a sidecar or init container because if the 3scale instance has multiple system-app replicas, they will all try to bootstrap the system database at the same time which could potentially cause problems. Some potential solutions include creating a Job CR that runs once or a separate Deployment that bootstraps the DB and then dies.
• system-sidekiq
• system-searchd

HOW

1. Create the new Deployments
2. Perform any component specific migration steps such as linking existing PVCs, user defined env vars, user defined requests/limits, etc.
3. Verify that the new Deployment is healthy
4. Delete the corresponding DeploymentConfig