JDK 1.8.0_232 timezone updates cause "Kwajalein" test failures again

I have a report that tests fail in JDK 1.8.0_232 because of timezone changes in (I believe) tzdata2018i or later, per https://www.oracle.com/technetwork/java/javase/tzdata-versions-138805.html:

*** FAILED *** with 8634 did not equal 8633 Round trip of 8633 did not work in tz

See also https://issues.apache.org/jira/browse/SPARK-24950

I say "I've heard" because I can't get this version easily on my Mac. However the fix is so inconsequential that I think we can just make it, to allow this additional variation just as before.