[Integrated] RFR: merge-bot: clearer merge messages when merging between repos

[Erik Helin]

Changeset: 19f5473d
Author:    Erik Helin <ehelin at openjdk.org>
Date:      2020-02-07 07:43:09 +0000
URL:       https://git.openjdk.java.net/skara/commit/19f5473d

merge-bot: clearer merge messages when merging between repos

Reviewed-by: rwestberg

! bots/merge/src/main/java/org/openjdk/skara/bots/merge/MergeBot.java
! bots/merge/src/test/java/org/openjdk/skara/bots/merge/MergeBotTests.java