Fixed restoreOnStartup for all QueryablePersistenceServices

the problem was, that every QueryablePersistenceService which is a ManagedService too, has not been initialized if the PersistenceManager wants to restore the saved state at startup, because the ManagedService.update method is called later. 

see: https://groups.google.com/forum/#!topic/openhab/tI6Gcru78WY
and: https://github.com/openhab/openhab/issues/1194