R1:4fb1a9e00f56

First Diff of Test Data Generator

Summary: Progress to fix T2903

Test Plan: Ran './bin/lipsum help' and 'generate' workflows.

Reviewers: epriestley

Reviewed By: epriestley

CC: aran, Korvin

Maniphest Tasks: T2903

Differential Revision: https://secure.phabricator.com/D5672