Add support for ServiceBusProcessor

[altsak]

Hello!
First, I wanted to express my appreciation for your project, as it seems a very promising solution for testing and rapid prototyping.
While working with the library, I noticed it doesn't currently support an in memory service bus processor, something that is important for our testing scenarios.
I've already implemented support for this feature by adding an InMemoryServiceBusProcessor .
The implementation:

• Aligns with the rest of your codebase
• Reuses your existing receiver implementation
• Maintains API compatibility with Azure Service Bus SDK
• Is backed up by unit tests

I'd be happy to submit a PR if this addition would be valuable to your project.

[tomas-pajurek]

Hello @altsak,

thanks for contributing. Such feature would be surely appreciated 👍.

I briefly peaked into your fork (https://github.com/altsak/in-memory-azure-test-sdk/tree/feature/create-processor) and the implementation seems very reasonable. If you open a PR, I will do a proper review and merge it as soon as it's ready.

[altsak]

Hello @tomas-pajurek ,
Thanks for taking a look at my fork! I've opened a PR ( #59 )