HDDS-15689. Compare MD5Hash directly in ScmInvokerCodeGenerator

[adoroszlai]

What changes were proposed in this pull request?

ozone/hadoop-hdds/server-scm/src/test/java/org/apache/hadoop/hdds/scm/ha/invoker/ScmInvokerCodeGenerator.java

Lines 643 to 645 in 29b2ad5

	final MD5Hash javaMd5 = MD5FileUtil.computeMd5ForFile(java);
	final MD5Hash tmpMd5 = MD5FileUtil.computeMd5ForFile(tmp);
	if (Arrays.equals(javaMd5.getDigest(), tmpMd5.getDigest())) {

getDigest() returns byte[] in Ratis 3.2.1, but ByteBuffer in 3.2.2 (RATIS-2361), resulting in compile error:

ScmInvokerCodeGenerator.java:[645,15] no suitable method found for equals(java.nio.ByteBuffer,java.nio.ByteBuffer)

MD5Hash#equals is based on digest internally, so we can make ScmInvokerCodeGenerator work with both versions of Ratis by checking equality of MD5Hash itself.

https://issues.apache.org/jira/browse/HDDS-15689

How was this patch tested?

Build, checkstyle, TestScmInvokerCodeGenerator

Build with Ratis 3.2.2:
https://github.com/adoroszlai/ozone/actions/runs/28229850840/job/83631071973

[Russole]

Thanks @adoroszlai for working on this. LGTM!

[priyeshkaratha]

Thanks @adoroszlai for the patch. Changes LGTM

[szetszwo]

+1 the change looks good. Thanks for fixing this!

[adoroszlai]

Thanks @priyeshkaratha, @Russole, @szetszwo for the review.