R1:6a4f12600034

Give the commitownersparser a little more time

Summary:
Recently we see issues with huge commits (branch cuts for www) where people received hundreds of emails for the same commit. By checking all the active and archived tasks related to such commits, I saw the following pattern:
- The commit itself is marked as importStatus = 15 which means all the processing was actually done;
- In archived tasks, I see one PhabricatorRepositorySvnCommitMessageParserWorker, one…