Wait for ES to be green before deleting configs #53437
Merged
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Testing manual creation of a keystore in Docker fails unpredictably on
7.6, possibly indicating a problem with deleting the keystore file
at a particular moment during Elasticsearch startup. In order to cut
this Gordian Knot, we should just wait for Elasticsearch to become green
before messing around with files that it needs for startup.
I'm also backporting a change to how we check whether ES is running. It
doesn't seem to be a problem with this test, but I think it's more
reliable. This got into 7.7 and master via #50610.
Closes #51316