The metaclass boilerplate is safe to apply en masse. The future import
boilerplate needs code to be inspected to be sure that there aren't any
py2isms that need to be fixed. Split these two checks so that we can
fix them independently
Be explicit about which files are grandfathered so we can fix them up one by one
* Create get_exception and wildcard import code-smell tests
* Add more detail to boilerplate and no-basestring descriptions
* Remove the no-list-cmp test as the pylint undefined-variable test covers it
