Automatic Circuit Breaking

[ChuckJonas]

Possible Approach:

• Add method to MessageRelayContext to "trip the breaker" open
• Once tripped, messages would no longer be sent for that subscription for a specified amount of time. Do we need to support breaking all subscriptions for a given app?
• Where can the breaker state be stored? Platform Cache?

TODO: Look at other circuit breaker implementations for API guidance before committing to design

• Poly: C# client
• opossum: node client