[Integrated] RFR: Add additional logging to the webrev availability verifier

[Robin Westberg]

Changeset: 771a56c4
Author:    Robin Westberg <rwestberg at openjdk.org>
Date:      2020-01-16 07:56:35 +0000
URL:       https://git.openjdk.java.net/skara/commit/771a56c4

Add additional logging to the webrev availability verifier

Reviewed-by: ehelin

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