systemtest: wait for geoIP database availability

[axw]

Motivation/summary

Elasticsearch downloads the geoIP database after starting up, and then refreshes it periodically. In CI the cluster will always be fresh, so we wait for the database to be downloaded before running any tests which may depend on the database being available.

Checklist

N/A

How to test these changes

N/A

Related issues

Closes #7260

[axw]

If anyone cares, this can be tested by temporarily disabling the geoIP downloader:

PUT /_cluster/settings?flat_settings=true
{
  "transient" : {
    "ingest.geoip.downloader.enabled" : "false"
  }
}

This clears out the cached databases. After setting it back to "true", they will be fetched again.

[marclop]

Thanks!

[ghost]

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• Start Time: 2022-02-14T03:22:07.871+0000

• Duration: 63 min 19 sec

Test stats 🧪

Test	Results
Failed	0
Passed	5634
Skipped	19
Total	5653

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