Spring Use for-each instead of counted loop when iterating over arrays

Just some cosmetic changes

Comment From: jhoeller

Good catch, I've partially rolled those into a polishing commit of mine.

Note that there's one CGLIB class in there (forked from https://github.com/cglib/cglib) which we won't modify on our end beyond the necessary patches. I've also kept MBeanClientInterceptor as-is largely for code alignment between both of its delegate methods there.

Thanks for the pull request, in any case!