HDFS-16729.RBF: fix some unreasonably annotated docs.

[jianghuazhu]

Description of PR

In the RBF module, there is some unreasonably annotated documentation, the purpose of this pr is to try and fix.
Details: HDFS-16729

How was this patch tested?

This is mainly related to documentation, and the test pressure is not large.

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 56s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 2 new or modified test files.
			_ trunk Compile Tests _
+1 💚	mvninstall	39m 56s		trunk passed
+1 💚	compile	0m 57s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	compile	0m 48s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	0m 41s		trunk passed
+1 💚	mvnsite	0m 53s		trunk passed
+1 💚	javadoc	1m 1s		trunk passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	1m 6s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	1m 39s		trunk passed
+1 💚	shadedclient	23m 51s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 39s		the patch passed
+1 💚	compile	0m 42s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javac	0m 42s		the patch passed
+1 💚	compile	0m 36s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	0m 36s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 22s		the patch passed
+1 💚	mvnsite	0m 38s		the patch passed
+1 💚	javadoc	0m 37s		the patch passed with JDK Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1
+1 💚	javadoc	0m 53s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	1m 26s		the patch passed
+1 💚	shadedclient	23m 26s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	31m 48s		hadoop-hdfs-rbf in the patch passed.
+1 💚	asflicense	0m 43s		The patch does not generate ASF License warnings.
		135m 26s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4745/3/artifact/out/Dockerfile
GITHUB PR	#4745
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux ab69528f5b1e 4.15.0-184-generic #194-Ubuntu SMP Thu Jun 2 18:54:48 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 20d4477
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Private Build-11.0.15+10-Ubuntu-0ubuntu0.20.04.1 /usr/lib/jvm/java-8-openjdk-amd64:Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4745/3/testReport/
Max. process+thread count	2281 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs-rbf U: hadoop-hdfs-project/hadoop-hdfs-rbf
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4745/3/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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[jianghuazhu]

Can you help review this pr, @goiri @ayushtkn .
Thank you.

[jianghuazhu]

Thank you, @goiri @Samrat002 .

[jianghuazhu]

@goiri , can you help merge this pr into the trunk branch?
Thank you very much.

[aajisaka]

Thank you @jianghuazhu for your contribution and thank you @goiri and @Samrat002 for your reviews.