[7.x] systemtest: remove TestDataStream*, fix Fleet test (backport #5503) #5513

mergify · 2021-06-22T07:23:22Z

This is an automatic backport of pull request #5503 done by Mergify.

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Remove the TestDataStreams tests, which test the server's internal/private/undocumneted configuration for enabling data streams. At least for now, this is only intended to be used with Fleet, so we should instead just rely on the Fleet system test. There was a bug in the Fleet test where apm-server would create "traces-apm-default" as a plain old index instead of a data stream in certain conditions: if the apm integration had previously been installed, then the traces-apm template would be deleted by CleanupElasticsearch. Because the package was already installed, creating the policy would not automatically reinstall it and add the missing template. We fix the Fleet issue by uninstalling the package during Fleet cleanup, after unenrolling agents. (cherry picked from commit 9f7d9b6)