Scap plugins: Tidy up imports for py3 transition
Python3 actually calls for using 'from . import bar' syntax for imports. This seems weird, as Python is not known for verbosity being a guiding trait. But when you think about it, it makes sense. When importing via ./.., you're making it completely explicit as to what module you're wanting to load. The one relative to your current file. So let's start moving there (and in fact, is what absolute_imports helps you when you get wrong).
Step 1: plugins.
While we're here, fix some lambda/list comprehension. It's not wrong as-is, but is easier to read and doesn't trigger idomatic warnings
Reviewers: mmodell, Release-Engineering-Team, thcipriani
Reviewed By: Release-Engineering-Team, thcipriani
Differential Revision: https://phabricator.wikimedia.org/D1041