fix bug when having reference to parametrizable interface before its concrete usage

[badetitou]

In the following case:

package generics;

import java.net.URL;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.HashMap;


public class OnlyReferenceToGeneric {

    private class InnerClass {
        

        private class InnerInnerClass {
            private final HashMap<String, String> mappings;

            private void solve(final String st) {
                while (this.mappings.keySet().size() > 0) {
                    final String cle = this.mappings.keySet().iterator().next();
                    solve(cle, st);
                }
            }
        }

    } 

}

The call to iterator() lead to the creation of the FamixJavaInterface Iterator instead of ParametrizableIInterface.
When parsing other file after this piece of code, the interface is thus not well retrieved and it creates issue such as class cast exception leading to not parsed file

This PR aims to resolve this issue

[badetitou]

In the PR, we also added a test to ensure that the feature is preserved in the future