RFR: Use seeded materialization for notifier, fix potential race condition

[Robin Westberg]

Hi all,

Please review this change that uses seeded materialization into a bare repository for the notifier, to increase performance. Also fix a potential race condition by fetching upstream content after enumerating branches.

Best regards,
Robin

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Commits:
 - 5c633736: Use seeded materialization for notifier, fix potential race condition

Changes: https://git.openjdk.java.net/skara/pull/446/files
 Webrev: https://webrevs.openjdk.java.net/skara/446/webrev.00
  Stats: 74 lines in 2 files changed: 24 ins; 31 del; 19 mod
  Patch: https://git.openjdk.java.net/skara/pull/446.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/446/head:pull/446

PR: https://git.openjdk.java.net/skara/pull/446