Remove Reflections Library Usage

[rnveach]

Pulled from #659 (comment) and #681 (comment) ,

We need to remove reflections library because since the move from Java 8, it hasn't been updated and basically does nothing. ronmamo/reflections#465 ronmamo/reflections#186

It is just doing a bare bones, common java code load. We should do that instead unless something better is found.

[rnveach]

For resources, Reflections basically calls ClassLoader.getResources.
https://github.com/ronmamo/reflections/blob/master/src/main/java/org/reflections/util/ClasspathHelper.java#L103

[Bananeweizen]

@rnveach if you are going to also work on this for the main project, please be aware that the usage of the classgraph library seems to avoid quite some corner cases that you would have with rolling an own implementation in Java:

• it knows about java module paths, too, which seem to be handled differently than class paths
• it scans without actually loading the classes, therefore it should be more performant

[rnveach]

I am not working on this in either projects. I doubt there is even an issue in main.

For Java classes, we use google's ClassPath for scanning classes for modules with 3rd party support. This library is only used for reading the meta files (resource files) in main repo. Not for Java files.