Middlewares are executed altough url doesnt exist in openapi spec

[jasonlazo]

Description

I am using Connexion with flask, i have some custom ASGI Middlewares and hooks in flask (methods decorated with before_request). both are executed altought url path doesnt exist.

Expected behaviour

I expect this code shouldnt be executed and the 404 should be returned cause connexion framework has a routingmiddleware that is called previously.

Actual behaviour

The middlewares and hooks are called, and Working outside of operation context error is raised cause context and request connexion object are not accesible

Steps to reproduce

Download this example project , and follow the steps on readme to replicate the errors.