RootStorageSvc+PersistencySvc: remove unused RootDomain options

Remove the following (mostly) unused options in RootDomain because they are modifying ROOT globals and causing thread-checker warnings:

• ASYNC_PREFETCHING
• ABORT_LEVEL
• ERROR_LEVEL

Only the last one was being used in the standalone SimpleUtilityBase and is now set there directly.

cc @ssnyder @gemmeren @mnowak