Integrated: Better logging in mlbridge

[Erik Joelsson]

Minor fix to get better logging information to help investigate SKARA-1172.

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Commit messages:
 - Better logging in mlbridge

Changes: https://git.openjdk.java.net/skara/pull/1219/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1219&range=00
  Stats: 7 lines in 2 files changed: 5 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/skara/pull/1219.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1219/head:pull/1219

PR: https://git.openjdk.java.net/skara/pull/1219