Summary: Modify `PhabricatorInfrastructureTestCase::testLibraryMap` to use `phutil_get_current_library_name()` instead of hard-coding the library name. Test Plan: See D9844. Reviewers: #blessed_reviewers, epriestley Reviewed By: #blessed_reviewers, epriestley Subscribers: epriestley, Korvin Differential Revision: https://secure.phabricator.com/D9845