HBASE-27117 Update the method comments for RegionServerAccounting

[tomscut]

JIRA: HBASE-27117.

After HBASE-15787, the return value type of RegionServerAccounting#isAboveHighWaterMark and RegionServerAccounting#isAboveLowWaterMark are no longer boolean.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 37s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	hbaseanti	0m 0s	Patch does not have any anti-patterns.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ master Compile Tests _
+1 💚	mvninstall	5m 16s	master passed
+1 💚	compile	2m 15s	master passed
+1 💚	checkstyle	0m 29s	master passed
+1 💚	spotless	0m 50s	branch has no errors when running spotless:check.
+1 💚	spotbugs	1m 14s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 8s	the patch passed
+1 💚	compile	2m 16s	the patch passed
+1 💚	javac	2m 16s	the patch passed
+1 💚	checkstyle	0m 26s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	hadoopcheck	12m 0s	Patch does not cause any errors with Hadoop 3.1.2 3.2.2 3.3.1.
+1 💚	spotless	0m 38s	patch has no errors when running spotless:check.
+1 💚	spotbugs	1m 19s	the patch passed
		_ Other Tests _
+1 💚	asflicense	0m 19s	The patch does not generate ASF License warnings.
		34m 58s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#4532
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti spotless checkstyle compile
uname	Linux 9e2cf534d901 5.4.0-1071-aws #76~18.04.1-Ubuntu SMP Mon Mar 28 17:49:57 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / f526609
Default Java	AdoptOpenJDK-1.8.0_282-b08
Max. process+thread count	64 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/console
versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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[Apache-HBase]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 39s	Docker mode activated.
-0 ⚠️	yetus	0m 3s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	2m 27s	master passed
+1 💚	compile	0m 34s	master passed
+1 💚	shadedjars	3m 51s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 23s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 7s	the patch passed
+1 💚	compile	0m 35s	the patch passed
+1 💚	javac	0m 35s	the patch passed
+1 💚	shadedjars	3m 50s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 21s	the patch passed
		_ Other Tests _
-1 ❌	unit	197m 32s	hbase-server in the patch failed.
		213m 42s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
GITHUB PR	#4532
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux f5e20c16d8e9 5.4.0-1071-aws #76~18.04.1-Ubuntu SMP Mon Mar 28 17:49:57 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / f526609
Default Java	AdoptOpenJDK-1.8.0_282-b08
unit	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/artifact/yetus-jdk8-hadoop3-check/output/patch-unit-hbase-server.txt
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/testReport/
Max. process+thread count	2462 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/console
versions	git=2.17.1 maven=3.6.3
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[Apache-HBase]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 40s	Docker mode activated.
-0 ⚠️	yetus	0m 3s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ master Compile Tests _
+1 💚	mvninstall	5m 25s	master passed
+1 💚	compile	0m 43s	master passed
+1 💚	shadedjars	4m 12s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 27s	master passed
		_ Patch Compile Tests _
+1 💚	mvninstall	2m 46s	the patch passed
+1 💚	compile	0m 45s	the patch passed
+1 💚	javac	0m 45s	the patch passed
+1 💚	shadedjars	4m 5s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 24s	the patch passed
		_ Other Tests _
-1 ❌	unit	193m 48s	hbase-server in the patch failed.
		214m 51s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#4532
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 7ffbf48c53c9 5.4.0-1071-aws #76~18.04.1-Ubuntu SMP Mon Mar 28 17:49:57 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / f526609
Default Java	AdoptOpenJDK-11.0.10+9
unit	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/artifact/yetus-jdk11-hadoop3-check/output/patch-unit-hbase-server.txt
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/testReport/
Max. process+thread count	2502 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4532/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

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[tomscut]

Thanks @virajjasani for your review.

[virajjasani]

Thanks for the contribution @tomscut