Service Bus batch support

[alrod]

Resolves #1024

It turned out that it's hard to implement batch processing using current architecture. Currently ServiceBus extension uses old non-generic approach with custom converters, collectors, etc.
So I tried to refactor ServiceBus extension using new approach (EventHub for example). I did not find ways to implement few things using new approach:

1. Poco converter uses only Json deserialization:
   https://github.com/Azure/azure-webjobs-sdk/blob/dev/src/Microsoft.Azure.WebJobs.Host/Triggers/TriggerArgumentBinding/PocoTriggerArgumentBinding.cs#L42
   SB message can be deserialized as XML using Message.GetBody<T>()
2. ParameterizedServiceBusPath for output bindings: https://github.com/Azure/azure-webjobs-sdk/blob/dev/src/Microsoft.Azure.WebJobs.Extensions.ServiceBus/Bindings/ParameterizedServiceBusPath.cs.
3. Adding function invocationId to UserProperties
   https://github.com/Azure/azure-webjobs-sdk/blob/dev/src/Microsoft.Azure.WebJobs.Extensions.ServiceBus/Listeners/ServiceBusCausalityHelper.cs#L15

[batizar]

@alrod any ideas about the estimated release of this feature? thanks.

[kwasak]

Any update on when this might be released?

[fabiocav]

@alrod closing stale PR. Please address conflicts and ping for review once ready. Thanks!