CommonPredicates returns the predicate which filter out the changes done to any field except for spec (e.g.

NewDeprecatedResourceWatcher creates a new resource watcher.

NewSecretHandler TODO Igor: refactor this to create generic constructor.

DeprecatedResourceWatcher is the object containing the map of watched_resource -> []dependant_resource.

EventHandlerWithDelete is an extension of EnqueueRequestForObject that will _not_ trigger a reconciliation for a Delete event.

ResourcesHandler is a special implementation of 'handler.EventHandler' that checks if the event for WatchedObject must trigger reconciliation for any Operator managed Resource (AtlasProject, AtlasDeployment etc).

WatchedObject is the object watched by controller.