Update the API code

[Otávio Gonçalves de Santana]

Hello everyone, I'm studying the code, mostly the container module. It
seems that in the master we support Java 8.
My question: Does make sense to create PRs to update some APIs to a modern
way?
I mean, e.g.:

for (int i = 0; i < rules.length; i++) {
    rules[i].validate(appModule);
}

To

for (ValidationRule rule : rules) {
    rule.validate(appModule);
}



Ps: That does not impact in performance, just does the code
cleaner/readable and more natural to maintainer IMHO.