RFR: Remove annoying debug logging

[Robin Westberg]

Remove the stacktrace log for a caught exception that is expected, and just clutters the log.

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Commit messages:
 - Remove annoying debug logging

Changes: https://git.openjdk.java.net/skara/pull/686/files
 Webrev: https://webrevs.openjdk.java.net/skara/686/webrev.00
  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.java.net/skara/pull/686.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/686/head:pull/686

PR: https://git.openjdk.java.net/skara/pull/686