Adds failing inheritance test from @bulv1ne
Adds failing inheritance test from @bulv1ne

apiguy/flask-classy,teracyhq/flask-classy,apiguy/flask-classy,teracyhq/flask-classy,ei-grad/muffin-classy,hoatle/flask-classy,mapleoin/flask-classy,apiguy/flask-classy,ei-grad/muffin-classy,stas/flask-classy