State transfer issue with the transactions for which the originator has crashed

State transfer migrates and prepares the transactions for which the originator has left. On the receiving node, this results in the transaction being prepared and acquiring backup locks which are never released (unless manual intervention).
This should behave as follows:

• if there's no recovery enabled, the state producer should not send such transactions but drop them
• if recovery is enabled these transactions should be sent across. They shouldn't be prepared/acquire backup locks, but be placed in the recovery cache (see RecoveryManagerImpl.inDoubtTransactions)