HBASE-26368 Fix checkstyle issues for HRegionServer for branch-2

[sourabhdhanotia]

Backport from #3764 and fixes for few other checkstyle issues that were only present for branch-2.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 10s	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 1s	The patch does not contain any @author tags.
		_ branch-2 Compile Tests _
+1 💚	mvninstall	4m 17s	branch-2 passed
+1 💚	compile	3m 28s	branch-2 passed
+1 💚	checkstyle	1m 17s	branch-2 passed
+1 💚	spotbugs	2m 13s	branch-2 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	3m 50s	the patch passed
+1 💚	compile	3m 26s	the patch passed
+1 💚	javac	3m 26s	the patch passed
+1 💚	checkstyle	1m 15s	hbase-server: The patch generated 0 new + 3 unchanged - 44 fixed = 3 total (was 47)
+1 💚	whitespace	0m 1s	The patch has no whitespace issues.
+1 💚	hadoopcheck	13m 55s	Patch does not cause any errors with Hadoop 3.1.2 3.2.1.
+1 💚	spotbugs	2m 23s	the patch passed
		_ Other Tests _
+1 💚	asflicense	0m 14s	The patch does not generate ASF License warnings.
		46m 2s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#3781
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti checkstyle compile
uname	Linux af2c3328fc21 4.15.0-147-generic #151-Ubuntu SMP Fri Jun 18 19:21:19 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	branch-2 / ecddf04
Default Java	AdoptOpenJDK-1.8.0_282-b08
Max. process+thread count	86 (vs. ulimit of 12500)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/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	1m 10s	Docker mode activated.
-0 ⚠️	yetus	0m 6s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ branch-2 Compile Tests _
+1 💚	mvninstall	4m 15s	branch-2 passed
+1 💚	compile	1m 1s	branch-2 passed
+1 💚	shadedjars	7m 13s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 40s	branch-2 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	3m 56s	the patch passed
+1 💚	compile	1m 0s	the patch passed
+1 💚	javac	1m 0s	the patch passed
+1 💚	shadedjars	7m 13s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 38s	the patch passed
		_ Other Tests _
+1 💚	unit	215m 12s	hbase-server in the patch passed.
		244m 19s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/artifact/yetus-jdk8-hadoop2-check/output/Dockerfile
GITHUB PR	#3781
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux 0303d2e9469e 4.15.0-147-generic #151-Ubuntu SMP Fri Jun 18 19:21:19 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	branch-2 / ecddf04
Default Java	AdoptOpenJDK-1.8.0_282-b08
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/testReport/
Max. process+thread count	2678 (vs. ulimit of 12500)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	2m 10s	Docker mode activated.
-0 ⚠️	yetus	0m 7s	Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --whitespace-eol-ignore-list --whitespace-tabs-ignore-list --quick-hadoopcheck
		_ Prechecks _
		_ branch-2 Compile Tests _
+1 💚	mvninstall	7m 20s	branch-2 passed
+1 💚	compile	1m 40s	branch-2 passed
+1 💚	shadedjars	10m 34s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	1m 5s	branch-2 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	6m 9s	the patch passed
+1 💚	compile	1m 40s	the patch passed
+1 💚	javac	1m 40s	the patch passed
+1 💚	shadedjars	9m 58s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	1m 1s	the patch passed
		_ Other Tests _
+1 💚	unit	260m 12s	hbase-server in the patch passed.
		304m 21s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#3781
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux fa05cda2379a 4.15.0-143-generic #147-Ubuntu SMP Wed Apr 14 16:10:11 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	branch-2 / ecddf04
Default Java	AdoptOpenJDK-11.0.10+9
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/testReport/
Max. process+thread count	2396 (vs. ulimit of 12500)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3781/1/console
versions	git=2.17.1 maven=3.6.3
Powered by	Apache Yetus 0.12.0 https://yetus.apache.org

This message was automatically generated.