Another MigrateToV13 run, force it with system property

There are projects for which the MigrateToV13 class didn't run correctly because the cluster wasn't brought down before upgrading (running deployment rather than stop/start). This has left incorrect properties like [hst:configuration] hst:lockedby and [hst:configuration] hst:lockedon (and more).

13.4.2 should've fixed it, see REPO-2305, but hasn't in all cases.

Forking the class is the only way out in case a production system is on 13.4.2 and still has those properties. Let's improve the class again, to have another round, and possibly have it listening to system property repo.MigrateToV13.force like in attached class MigrateToV13.java .