RFR: test-bot: better logging for IOException

[Erik Helin]

Hi all,

please review this small patch that updates the logging for the test bot when it
receives an `IOException`.

Testing:
- `make test` passes on Linux x64

Thanks,
Erik

-------------

Commits:
 - c90268cd: test-bot: better logging for IOException

Changes: https://git.openjdk.java.net/skara/pull/430/files
 Webrev: https://webrevs.openjdk.java.net/skara/430/webrev.00
  Stats: 42 lines in 1 file changed: 16 ins; 9 del; 17 mod
  Patch: https://git.openjdk.java.net/skara/pull/430.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/430/head:pull/430

PR: https://git.openjdk.java.net/skara/pull/430