Modified MarketplaceMonitorDaemon to optionally run in single mode.

[wlara]

No description provided.

[AndrewWestberg]

@wlara What happens if we end up monitoring from both running instances at the same time? My code kinda/sorta still works since it's relying on SQS queues which (in theory but not in practice), only get delivered to a single instance.

[wlara]

@wlara What happens if we end up monitoring from both running instances at the same time? My code kinda/sorta still works since it's relying on SQS queues which (in theory but not in practice), only get delivered to a single instance.

That's a problem. Single-mode is intended as a short term solution to enable testing in the garage environment. By the time we deploy the smart contracts in mainnet, we need to enable multi-mode and have Zookeeper running.