TransportAnalyticsStatsActionTests fail on master

[mayya-sharipova]

./gradlew ':x-pack:plugin:analytics:test' --tests "org.elasticsearch.xpack.analytics.action.TransportAnalyticsStatsActionTests.test"
-Dtests.seed=C06A02480587257E
-Dtests.security.manager=true
-Dtests.locale=es-PY
-Dtests.timezone=Africa/Luanda
-Dcompiler.java=13

Test with this seed reproducibly fails for me.

As the test overall doesn't fail, only with this particular seed, I am not going to mute it for now.

Log: https://elasticsearch-ci.elastic.co/job/elastic+elasticsearch+master+multijob-unix-compatibility/os=sles-12&&immutable/673/console
Build Scans: https://gradle-enterprise.elastic.co/s/nmicdnymlrs4a

Console output:

java.lang.AssertionError: 
Expected: <0>
     but: was null
	at __randomizedtesting.SeedInfo.seed([C06A02480587257E:483E3D92AB7B4886]:0)
	at org.hamcrest.MatcherAssert.assertThat(MatcherAssert.java:18)
	at org.junit.Assert.assertThat(Assert.java:956)
	at org.junit.Assert.assertThat(Assert.java:923)
	at org.elasticsearch.xpack.analytics.action.TransportAnalyticsStatsActionTests.test(TransportAnalyticsStatsActionTests.java:66)

[elasticmachine]

Pinging @elastic/es-analytics-geo (:Analytics/Aggregations)

[mayya-sharipova]

Actually, there were quite a number of failures so the test was muted.