YARN-11075. Explicitly declare serialVersionUID in LogMutation class.…

[brumi1024]

… Contributed by Benjamin Teke

Description of PR

How was this patch tested?

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	10m 53s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	31m 27s		branch-3.3 passed
+1 💚	compile	0m 48s		branch-3.3 passed
+1 💚	checkstyle	0m 37s		branch-3.3 passed
+1 💚	mvnsite	0m 55s		branch-3.3 passed
+1 💚	javadoc	0m 42s		branch-3.3 passed
+1 💚	spotbugs	1m 53s		branch-3.3 passed
+1 💚	shadedclient	24m 24s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 52s		the patch passed
+1 💚	compile	0m 44s		the patch passed
+1 💚	javac	0m 44s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 29s		the patch passed
+1 💚	mvnsite	0m 48s		the patch passed
+1 💚	javadoc	0m 30s		the patch passed
+1 💚	spotbugs	1m 57s		the patch passed
+1 💚	shadedclient	23m 48s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	106m 42s		hadoop-yarn-server-resourcemanager in the patch passed.
+1 💚	asflicense	0m 31s		The patch does not generate ASF License warnings.
		207m 13s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4012/1/artifact/out/Dockerfile
GITHUB PR	#4012
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux 1a0e887e5003 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / ae9ae5a
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4012/1/testReport/
Max. process+thread count	876 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4012/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[szilard-nemeth]

Thanks @brumi1024 ,
Merged your patch.