Create util to perform generic aware callbacks

[philwebb]

We have quite a few calls now that use generically typed listeners of the form:

public interface SomeListener<T> {

    call(T arg);

}

The pattern to filter the listeners based on a resolvable type, make the call and deal with possible Lamda issues could be extracted.

Search the codebase for "Possibly a lambda-defined" to find the existing occurrences.

[snicoll]

That could be a core util in the framework.

[spencergibb]

Looks similar to https://docs.oracle.com/javase/8/docs/api/java/util/function/Consumer.html

[philwebb]

@spencergibb It would be more involved I think. I'd like to cut out the generic resolution and lambda try..catch dance that we keep repeating. See this code for an example.

[spencergibb]

👍

[philwebb]

One bonus of the extra tests is it seems to have found a problem when running on JDK 9. I think framework also has the same issue so I've raised SPR-16435