RFR: 1243: BotRunnerTests may fail intermittently

[Erik Joelsson]

There is a potential race causing intermittent failures in the BotRunnerTests. This patch reduces concurrency to 1 for the executor in the affected tests. I believe the tests are still verifying the core behavior as intended even without parallel execution.

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Commit messages:
 - Unify formatting
 - SKARA-1243

Changes: https://git.openjdk.java.net/skara/pull/1240/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=1240&range=00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-1243
  Stats: 6 lines in 1 file changed: 4 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/skara/pull/1240.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/1240/head:pull/1240

PR: https://git.openjdk.java.net/skara/pull/1240