[Integrated] RFR: Use a stable creation date for new revisions

[Robin Westberg]

Changeset: 67e9843f
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-02-11 10:02:14 +0000
URL:       https://git.openjdk.java.net/skara/commit/67e9843f

Use a stable creation date for new revisions

Reviewed-by: ehelin

! bots/mlbridge/src/main/java/org/openjdk/skara/bots/mlbridge/ArchiveItem.java
! bots/mlbridge/src/main/java/org/openjdk/skara/bots/mlbridge/ReviewArchive.java
! bots/mlbridge/src/test/java/org/openjdk/skara/bots/mlbridge/MailingListBridgeBotTests.java