Travis shouldn't autofail msftidy fails... yet

See https://dev.metasploit.com/redmine/issues/8498

We have about three hundred warnings and failures in shipping modules. We need to get ahead of this if Travis auto-failing builds based on bad msftidy modules is going to be credible.

Committers of Metasploit Framework should have this post-merge hook active, though -- they can use their own judgement if fails and warns are new or are old. That's kind of hard to teach travis.