RFR: 178: Test bot misses transition from RUNNING to COMPLETE

[Erik Helin]

Hi all,

please review this pull request that ensures that the test bot will execute a
`TestWorkItem` when jobs are doing the final transition from `RUNNING` to
`COMPLETE`. This is done by having the `TestBot` observe the two last states,
not just the last state. By observing the last two states, the `TestBot` can
witness the final transition from `RUNNING` to `COMPLETE`.

Thanks,
Erik

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

Commits:
 - bbd9bde1: 178: Test bot misses transition from RUNNING to COMPLETE

Changes: https://git.openjdk.java.net/skara/pull/289/files
 Webrev: https://webrevs.openjdk.java.net/skara/289/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-178
  Stats: 20 lines in 1 file changed: 17 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/skara/pull/289.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/289/head:pull/289

PR: https://git.openjdk.java.net/skara/pull/289