This can be reverted in 1.1. The compiler relies on being able to
bind itself to @ConfigurationProperties and the APIs changed for that
in Spring Boot 2.0.
Fixes gh-177
This results in a better experience for users because the consumer
that they write is only applied to a Flux that is subscribed to
by the framework once. It gives better control over the flow of
foos, e.g. if some component wants to subscribe on a thread.
