RFR: Avoid updating unchanged checks

[Robin Westberg]

When the test info bot summarizes checks, there's no need to update summarized items that haven't changed. Also update the not-configured notice properly.

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Commit messages:
 - Avoid updating unchanged checks

Changes: https://git.openjdk.java.net/skara/pull/976/files
 Webrev: https://webrevs.openjdk.java.net/?repo=skara&pr=976&range=00
  Stats: 132 lines in 2 files changed: 67 ins; 56 del; 9 mod
  Patch: https://git.openjdk.java.net/skara/pull/976.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/976/head:pull/976

PR: https://git.openjdk.java.net/skara/pull/976