org.apache.camel.quarkus.component.splunk.it.SplunkTest failure if system timezone isn't UTC

[ffang]

When running this test locally, I constantly got error like "Invalid latest_time: latest_time must be after earliest_time."
I strongly suspect this is a timezone configuration issue because if I set initEarliestTime=-14440s(4 hours offset of my time to UTC), I don't see this error but still can't retrieve any previously inserted entry from splunk.

After a couple of trail-error I realized that splunk docker image doesn't ship linux tzdata package so actually we can't simply specify the TZ ENV. We must install this package first with "sudo microdnf"