[Integrated] RFR: Update messages when a reviewer isn't a project member

[Robin Westberg]

Changeset: 592533cd
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2019-11-12 13:55:47 +0000
URL:       https://git.openjdk.java.net/skara/commit/592533cd

Update messages when a reviewer isn't a project member

Reviewed-by: ehelin

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