It tends to pop back into function apps where it is not needed
otherwise. Users that want to use the library need to import
the FunctionConfiguration directly using the
@EnableFunctionDeployer convenience annotation..
Instead of an app, it is now a library with some utilities
(principally ApplicationBootstrap) for launching a Spring Boot
application, extracting a function, and registering it in the
FunctionRegistry.
Make it deployable via its maven coordinates in
spring-cloud-function-deployer (it is deployed by default on start
up right now, but that's just a demo)
