Ledger Manager Broker Disposes Device

[MelbourneDeveloper]

The Ledger is odd because the device drops off the connection when it is not in the right state. This causes the Ledger manager broker to dispose the Ledger and the subsequent attempt will fail.

There may need to be a fix at the level of Device.Net, but perhaps the LedgerManagerBroker needs to be ready for this scenario and rewait for the next connection when this occurs. Once this is fixed, there needs to be a regression unit test around this.