title: Returning a pass/fail to robot framework from python code
body: <p>I'm automating some software tests at the moment and I was wondering if it's possible to pass or fail a test in python so that RF shows the same result. For example, I'm doing an install test and at the end I check through the registry to confirm a clean install. If anything is missing I want to be able to essentially exit(0) and have RF show a fail, but just returns "[ ERROR ] Execution stopped by user."</p>