This change renames directories in preparation for the great package
rename. The repository is now in a broken state because the code
itself hasn't been updated. However this should ensure that git
correctly preserves history for each file.
Backfill [] to follow, and the Recurring billing events will eventually be replicated as OneTime via a regular job.
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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=119883652