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

[Robin Westberg]

Changeset: cdb7dd43
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-02-18 13:27:00 +0000
URL:       https://git.openjdk.java.net/skara/commit/cdb7dd43

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

Reviewed-by: ehelin

! bots/mlbridge/src/main/java/org/openjdk/skara/bots/mlbridge/ArchiveWorkItem.java