Making @WorkerTask tasks aware of spring boot beans

[avery1701]

I wrote some workers using the java-sdk @WorkerTask annotation. To make the task aware for spring boot beans I had to hack together a subclass of WorkflowExecutor and expose an addBean() method on the AnnotatedWorkerExecutor. Likewise when I wanted to add custom Jackson deserializers to the ObjectMapper I had to make copies of AnnotatedWorkerExector and AnnotatedWorker to be able to register the deserializers on the private ObjectMapper within AnnotatedWorker.

Anyone know if there is a better way to do this?

[avery1701]

I made a PR on java-sdk that would allow beans and deserializers to be added to an @WorkerTask #234