HDFS-16556.Fixtypos in distcp

[GuoPhilipse]

JIRA:HDFS-HDFS-16556

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	17m 27s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	mvninstall	42m 8s		trunk passed
+1 💚	mvnsite	0m 44s		trunk passed
+1 💚	shadedclient	65m 39s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 29s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 28s		the patch passed
+1 💚	shadedclient	22m 33s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 42s		The patch does not generate ASF License warnings.
		108m 18s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4217/1/artifact/out/Dockerfile
GITHUB PR	#4217
Optional Tests	dupname asflicense mvnsite codespell
uname	Linux f7ac0cfe06f4 4.15.0-175-generic #184-Ubuntu SMP Thu Mar 24 17:48:36 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / dc16cb4
Max. process+thread count	523 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-distcp U: hadoop-tools/hadoop-distcp
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4217/1/console
versions	git=2.25.1 maven=3.6.3
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[dineshchitlangia]

+1 LGTM

[GuoPhilipse]

thanks @prasad-acit for your review ,and @dineshchitlangia for your review and merge~:)