StackOverflowError when parsing generic signature

[Ladicek]

Byte Buddy's ByteCodeElement.TypeDependant type includes a generic signature that confuses Jandex's parser, which ends up in an infinite regress: public interface TypeDependant<T extends TypeDependant<?, S>, S extends Token<S>> { ... }. The T type parameter is defined recursively, but not recursively in T. When adding tests for recursive type variables, I forgot to add a test for this.

Fix actually simplifies the method that figures out if a type parameter is recursive, so this is a double win.