RFR: Add test mailserver logging

[Robin Westberg]

Hi all,

Please review this minor change that adds a bit of logging.

Best regards,
Robin

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Commits:
 - dac24015: force new check
 - 2ded1c51: Try to repro with logging

Changes: https://git.openjdk.java.net/skara/pull/327/files
 Webrev: https://webrevs.openjdk.java.net/skara/327/webrev.00
  Stats: 12 lines in 2 files changed: 10 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/skara/pull/327.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/327/head:pull/327

PR: https://git.openjdk.java.net/skara/pull/327