---
fixes:
  - If given, apply the configuration overrides in prepare,
    just before creating initial users and/or databases.
    Failure to apply the given configuration should flip the
    instance into a failed state.
    Default implementation saves the overrides and
    restarts the database service to apply the changes.
    Datastores that do not require restart may potentially override
    the base implementation in 'apply_overrides_on_prepare()'.