Adding feature to configure upload size with annotation

Because there are some times we want to configure upload size with different values for another method. Or we want to configure a value without overriding a class.

If you like it, I'll add documentation.
Like my previous comment, I think that is better place here because we already have `containsAnnotation`, `getAnnotations`. And now `getAnnotation`. The implementation for these 3 methods only delegates to real Java method to avoid to use `getMethod().getSomething()`.