[Integrated] RFR: Use @mentions to improve email threading

[Robin Westberg]

Changeset: 7d37ea9b
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-02-28 09:25:28 +0000
URL:       https://git.openjdk.java.net/skara/commit/7d37ea9b

Use @mentions to improve email threading

Reviewed-by: ehelin

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