HBASE-25819 Fix style issues for StochasticLoadBalancer

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[Apache-HBase]

💔 -1 overall

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		_ Prechecks _
		_ master Compile Tests _
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		_ Patch Compile Tests _
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		40m 34s

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-3207/1/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#3207
Optional Tests	javac javadoc unit shadedjars compile
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versions	git=2.17.1 maven=3.6.3
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Vote	Subsystem	Runtime	Comment
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		_ Prechecks _
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		_ master Compile Tests _
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		_ Patch Compile Tests _
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		_ Other Tests _
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		46m 55s

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-3207/1/artifact/yetus-general-check/output/Dockerfile
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🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	0m 26s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 1s	No case conflicting files found.
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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-3207/2/artifact/yetus-general-check/output/Dockerfile
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versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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		_ master Compile Tests _
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		187m 28s

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		_ master Compile Tests _
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		_ Patch Compile Tests _
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		275m 39s

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versions	git=2.17.1 maven=3.6.3
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	2m 37s	Docker mode activated.
		_ Prechecks _
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		_ Patch Compile Tests _
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		62m 32s

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-3207/3/artifact/yetus-general-check/output/Dockerfile
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versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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		_ Prechecks _
		_ master Compile Tests _
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		174m 57s

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-3207/3/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
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versions	git=2.17.1 maven=3.6.3
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🎊 +1 overall

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		249m 8s

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-3207/3/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
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🎊 +1 overall

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+0 🆗	reexec	0m 26s	Docker mode activated.
		_ Prechecks _
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		_ Patch Compile Tests _
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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-3207/4/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#3207
Optional Tests	dupname asflicense javac spotbugs hadoopcheck hbaseanti checkstyle compile
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Max. process+thread count	95 (vs. ulimit of 30000)
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versions	git=2.17.1 maven=3.6.3 spotbugs=4.2.2
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💔 -1 overall

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		_ Prechecks _
		_ master Compile Tests _
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		191m 25s

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-3207/4/artifact/yetus-jdk11-hadoop3-check/output/Dockerfile
GITHUB PR	#3207
Optional Tests	javac javadoc unit shadedjars compile
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Build tool	maven
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git revision	master / 2382f68
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unit	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3207/4/artifact/yetus-jdk11-hadoop3-check/output/patch-unit-hbase-server.txt
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3207/4/testReport/
Max. process+thread count	3743 (vs. ulimit of 30000)
modules	C: hbase-common hbase-server U: .
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3207/4/console
versions	git=2.17.1 maven=3.6.3
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[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 2s	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 _
+0 🆗	mvndep	0m 12s	Maven dependency ordering for branch
+1 💚	mvninstall	4m 0s	master passed
+1 💚	compile	1m 24s	master passed
+1 💚	shadedjars	8m 53s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 56s	master passed
		_ Patch Compile Tests _
+0 🆗	mvndep	0m 14s	Maven dependency ordering for patch
+1 💚	mvninstall	4m 2s	the patch passed
+1 💚	compile	1m 28s	the patch passed
+1 💚	javac	1m 28s	the patch passed
+1 💚	shadedjars	9m 3s	patch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 58s	the patch passed
		_ Other Tests _
+1 💚	unit	1m 53s	hbase-common in the patch passed.
+1 💚	unit	209m 44s	hbase-server in the patch passed.
		246m 1s

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-3207/4/artifact/yetus-jdk8-hadoop3-check/output/Dockerfile
GITHUB PR	#3207
Optional Tests	javac javadoc unit shadedjars compile
uname	Linux ee2786c81b92 4.15.0-136-generic #140-Ubuntu SMP Thu Jan 28 05:20:47 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 2382f68
Default Java	AdoptOpenJDK-1.8.0_282-b08
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3207/4/testReport/
Max. process+thread count	3456 (vs. ulimit of 30000)
modules	C: hbase-common hbase-server U: .
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-3207/4/console
versions	git=2.17.1 maven=3.6.3
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[nyl3532016]

+1

[nyl3532016]

Whether we need put these CostFunction to a single package, they only used by StochasticLoadBalancer

[Apache9]

Whether we need put these CostFunction to a single package, they only used by StochasticLoadBalancer

It is for making the file smaller. All the classes are static so I do not think we need to make them as inner classes. And we already have a CostFunction implementation as a separated file.