It is buggy (throwing exceptions for undefinied variables which are
actualyl defined via set_fact), and we frequently run into problems
using it in this repo. It was designed to lint roles for Galaxy,
not the way we write ansible. As of the 5.0.0 release it's
generating >4.5K lines of complaints about files in this repository.
Change-Id: If9d8c19b5e663bdd6b6f35ffed88db3cff3d79f8
e58a18d8a1