HBASE-29558: Addendum to fix checkstyle warnings

[haridsv]

Addendum to PR #7256

Also includes the following additional changes done in PR #7274 from branch-2:

• Reverted the change admin test, adding back the dedicated driver and renaming the ruby test file.
• Removed BaseTestShell as it is no longer needed after serving the requirement of admin test via its own driver
• The base setUp() method now uses a single node cluster and only admin and RS group tests override it to 3 nodes.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 30s		Docker mode activated.
-0 ⚠️	yetus	0m 3s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ master Compile Tests _
+1 💚	mvninstall	3m 25s		master passed
+1 💚	compile	0m 16s		master passed
+1 💚	javadoc	0m 12s		master passed
+1 💚	shadedjars	6m 15s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 12s		the patch passed
+1 💚	compile	0m 17s		the patch passed
+1 💚	javac	0m 17s		the patch passed
+1 💚	javadoc	0m 10s		the patch passed
+1 💚	shadedjars	6m 13s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
+1 💚	unit	6m 46s		hbase-shell in the patch passed.
		28m 14s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7277/1/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#7277
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux 2b10cd531713 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 9b18070
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7277/1/testReport/
Max. process+thread count	1672 (vs. ulimit of 30000)
modules	C: hbase-shell U: hbase-shell
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7277/1/console
versions	git=2.34.1 maven=3.9.8
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 58s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	hbaseanti	0m 0s		Patch does not have any anti-patterns.
			_ master Compile Tests _
+1 💚	mvninstall	3m 24s		master passed
+1 💚	compile	0m 19s		master passed
+1 💚	checkstyle	0m 8s		master passed
+1 💚	spotbugs	0m 0s		master passed
+1 💚	spotless	0m 50s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 10s		the patch passed
+1 💚	compile	0m 18s		the patch passed
+1 💚	javac	0m 18s		hbase-shell generated 0 new + 2 unchanged - 5 fixed = 2 total (was 7)
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 7s		the patch passed
+1 💚	rubocop	0m 15s		No new issues.
+1 💚	spotbugs	0m 0s		the patch passed
+1 💚	hadoopcheck	12m 11s		Patch does not cause any errors with Hadoop 3.3.6 3.4.0.
+1 💚	spotless	0m 46s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 10s		The patch does not generate ASF License warnings.
		30m 41s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7277/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#7277
Optional Tests	dupname asflicense javac spotbugs checkstyle codespell detsecrets compile hadoopcheck hbaseanti spotless rubocop
uname	Linux 6b74986ac03e 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 9b18070
Default Java	Eclipse Adoptium-17.0.11+9
Max. process+thread count	83 (vs. ulimit of 30000)
modules	C: hbase-shell U: hbase-shell
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-7277/1/console
versions	git=2.34.1 maven=3.9.8 rubocop=1.37.1
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[virajjasani]

+1