Goal: 

• Use named returns in checkDeployment(). Instead of:
  https://github.com/openstack-k8s-operators/openstack-operator/blob/51697a2ec466816d5dd6e3caa83d23f579e4ed76/controllers/dataplane/openstackdataplanenodeset_controller.go#L466

(bool, bool, bool, string, error) 

• Reduce mental load of which bool needs to be returned at which point by using variables instead.