HDFS-16551. CryptoInputStream#close() should be syncronized

[prasad-acit]

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?

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	10m 26s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+1 💚	@author	0m 1s		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.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	39m 15s		branch-3.3 passed
+1 💚	compile	18m 53s		branch-3.3 passed
+1 💚	checkstyle	1m 13s		branch-3.3 passed
+1 💚	mvnsite	1m 52s		branch-3.3 passed
+1 💚	javadoc	2m 6s		branch-3.3 passed
+1 💚	spotbugs	2m 57s		branch-3.3 passed
+1 💚	shadedclient	28m 31s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 2s		the patch passed
+1 💚	compile	17m 52s		the patch passed
+1 💚	javac	17m 52s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 7s		the patch passed
+1 💚	mvnsite	1m 49s		the patch passed
+1 💚	javadoc	1m 57s		the patch passed
+1 💚	spotbugs	2m 54s		the patch passed
+1 💚	shadedclient	28m 19s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	17m 39s		hadoop-common in the patch passed.
+1 💚	asflicense	1m 13s		The patch does not generate ASF License warnings.
		177m 47s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4214/1/artifact/out/Dockerfile
GITHUB PR	#4214
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell
uname	Linux 447e3ec0a459 4.15.0-153-generic #160-Ubuntu SMP Thu Jul 29 06:54:29 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / 5f4f85a
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4214/1/testReport/
Max. process+thread count	2420 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4214/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[steveloughran]

thanks, yetus is happy; done the cherrypick of the original pr in and pushed that up, so closing this one