YARN-11077. containersToClean not need to use TreeSet In RMNodeImpl

[ChaosJu]

Description of PR

How was this patch tested?

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[ChaosJu]

containersToClean Set don't need to sort, mainly used to look up. So simply replace it with HashSet

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	1m 0s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
			_ trunk Compile Tests _
+1 💚	mvninstall	35m 3s		trunk passed
+1 💚	compile	1m 5s		trunk passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 💚	compile	0m 56s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	checkstyle	0m 45s		trunk passed
+1 💚	mvnsite	1m 1s		trunk passed
+1 💚	javadoc	0m 49s		trunk passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	0m 43s		trunk passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	2m 0s		trunk passed
+1 💚	shadedclient	24m 19s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 55s		the patch passed
+1 💚	compile	0m 59s		the patch passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 💚	javac	0m 59s		the patch passed
+1 💚	compile	0m 50s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	javac	0m 50s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
-0 ⚠️	checkstyle	0m 38s	/results-checkstyle-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager: The patch generated 2 new + 12 unchanged - 0 fixed = 14 total (was 12)
+1 💚	mvnsite	0m 53s		the patch passed
+1 💚	javadoc	0m 41s		the patch passed with JDK Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04
+1 💚	javadoc	0m 35s		the patch passed with JDK Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
+1 💚	spotbugs	2m 1s		the patch passed
+1 💚	shadedclient	24m 9s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	138m 51s	/patch-unit-hadoop-yarn-project_hadoop-yarn_hadoop-yarn-server_hadoop-yarn-server-resourcemanager.txt	hadoop-yarn-server-resourcemanager in the patch passed.
-1 ❌	asflicense	0m 30s	/results-asflicense.txt	The patch generated 1 ASF License warnings.
		237m 35s

Reason	Tests
Failed junit tests	hadoop.yarn.server.resourcemanager.scheduler.fair.TestFairSchedulerQueueACLs
	hadoop.yarn.server.resourcemanager.security.TestAMRMTokens
	hadoop.yarn.server.resourcemanager.TestApplicationACLs
	hadoop.yarn.server.resourcemanager.TestClientRMService
	hadoop.yarn.server.resourcemanager.scheduler.capacity.TestApplicationPriorityACLs
	hadoop.yarn.server.resourcemanager.scheduler.capacity.TestCapacitySchedulerQueueACLs
	hadoop.yarn.server.resourcemanager.security.TestClientToAMTokens

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3997/1/artifact/out/Dockerfile
GITHUB PR	#3997
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux 001b75af10ee 4.15.0-162-generic #170-Ubuntu SMP Mon Oct 18 11:38:05 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / dac0811
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~20.04-b07
Multi-JDK versions	/usr/lib/jvm/java-11-openjdk-amd64:Ubuntu-11.0.13+8-Ubuntu-0ubuntu1.20.04 /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-3997/1/testReport/
Max. process+thread count	923 (vs. ulimit of 5500)
modules	C: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager U: hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3997/1/console
versions	git=2.25.1 maven=3.6.3 spotbugs=4.2.2
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