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Vibhatha Lakmal Abeykoon authored and GitHub committed 7bc2452b350
GH-41902: [Java] Variadic Buffer Counts Incorrect (#41930) ### Rationale for this change In the initial PR for `variadicBufferCounts` addition to Java spec, the non variadic buffer-ed vectors were assigned with 0 valued non-empty `variadicBufferCounts`. And this caused CIs to fail in Arrow Rust. ### What changes are included in this PR? This PR changes such that non variadic buffer-ed vectors would contain an empty `variadicBufferCounts` attribute in `ArrowRecordBatch` interface in Java. Also this includes upgrade to JUNIT5. ### Are these changes tested? Yes, from existing tests and a new test added. ### Are there any user-facing changes? No * GitHub Issue: #41902 Authored-by: Vibhatha Abeykoon <vibhatha@gmail.com> Signed-off-by: David Li <li.davidm96@gmail.com>