Rename example classes
Rename example classes

Summary: Ref T5655.

Test Plan: Ran the script

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: Korvin, epriestley

Maniphest Tasks: T5655

Differential Revision: https://secure.phabricator.com/D11675

julkiewicz/libphutil,julkiewicz/libphutil,julkiewicz/libphutil