I18n does not load translation files

PoReader does not check ALL translation candidates.

In PoReader.readPoElseNull(final Locale locale)

for (final String candidate : candidates) {
    final List<String> lines = readUrl(candidate);
    if(lines != null) {
        return lines;
    }
} 

always returns at the first candidate, regardless of existing of the file/resource, as readUrl never returns null, because readUrl is a stream collect. I think it should carry on loading resources when lines == null || lines.size() == 0.

If I had translation_hu.po, it was the last candidate, it was never loaded.