The processing of supertypes for java source would convert PsiClassTypes to PsiClasses while creating AncestryNodes. This meant that the type parameters used for the supertypes were from the PsiClass definition instead of the PsiClassType usage like they should be.

For example, in the following java code:

class Bar<T> {}
public class Foo extends Bar<String> {}

The super class type of Foo should be Bar<String>. When processing the supertypes of Foo, the PsiClassType representing Bar<String> was converted to a PsiClass. The PsiClass reflects the definition of Bar, so Bar<T> became the super class type instead of Bar<String>.

Fixes: #3996