Daz DeBoer 15a8123fbc Validate presense of gradle wrapper to provide better feedback
- Provide a more useful error message when no Gradle wrapper can be located,
  and 'gradle-version' or 'gradle-executable' is not used.
- Add test for case where wrapper is missing.
  This isn't really a "test" per-se, but this failing build invocation makes it
  easy to verify the GitHub action behaviour when the build is misconfigured.
2021-07-08 08:01:44 -06:00
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