RFR: Retry the mbox push action a few times in case of concurrent updates

[Robin Westberg]

Hi all,

Please review this small change that retries the mbox push action a few times, to avoid errors when there are concurrent updates (to unrelated mboxes). Also performs a rebase action if needed to decrease the chance of an error.

Best regards,
Robin

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Commits:
 - 14e99ad0: Retry the mbox push action a few times in case of concurrent updates, as well as attempt to rebase

Changes: https://git.openjdk.java.net/skara/pull/450/files
 Webrev: https://webrevs.openjdk.java.net/skara/450/webrev.00
  Stats: 18 lines in 1 file changed: 12 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/skara/pull/450.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/450/head:pull/450

PR: https://git.openjdk.java.net/skara/pull/450