Lee Hinman 7d449c5f65
Check that delete index request succeeded in test teardown (#38903) (#38913)
Backport of #38903

When tearing down from `ESSingleNodeTestCase` we perform a delete on "*"
indices, it some cases, however, those indices are not fully deleted. Rather
than have a failure occur later down the change (see:
https://github.com/elastic/elasticsearch/issues/30290#issuecomment-463589008 )
the failure should occurr immediately so it can be diagnosed more easily.
2019-02-14 13:46:17 -07:00
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