markusthoemmes opened a new pull request #4841: Replace parallel collections with future based concurrency in tests. URL: https://github.com/apache/openwhisk/pull/4841 <!--- Provide a concise summary of your changes in the Title --> ## Description Scala 2.13 puts parallel collections into a separate module that's not compatible with Scala 2.12. To avoid having to work around things and to keep cross-compilation compatibility this just exchanges the approach for concurrency in tests to not use parallel collections at all. ## Related issue and scope Ref #4741 ## Checklist: <!--- Please review the points below which help you make sure you've covered all aspects of the change you're making. --> - [X] I signed an [Apache CLA](https://github.com/apache/openwhisk/blob/master/CONTRIBUTING.md). - [X] I reviewed the [style guides](https://github.com/apache/openwhisk/wiki/Contributing:-Git-guidelines#code-readiness) and followed the recommendations (Travis CI will check :). - [X] I added tests to cover my changes.
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