RFR: 124: The sponsor label should only be set on PRs that are ready for integration

[Robin Westberg]

Hi all,

Please review this change that ensures that the `sponsor` label is removed from a PR if it transitions away from the `ready` state. Also run a final jcheck before pushing to enforce this.

Best regards,
Robin

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Commits:
 - 7c6463df: The sponsor label should only be set on PRs that are ready for integration

Changes: https://git.openjdk.java.net/skara/pull/191/files
 Webrev: https://webrevs.openjdk.java.net/skara/191/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/SKARA-124
  Stats: 110 lines in 3 files changed: 104 ins; 0 del; 6 mod
  Patch: https://git.openjdk.java.net/skara/pull/191.diff
  Fetch: git fetch https://git.openjdk.java.net/skara pull/191/head:pull/191

PR: https://git.openjdk.java.net/skara/pull/191