HDFS-17682. Fix incorrect command of fs2img tool.

[fuchaohong]

-Ddfs.provided.aliasmap.text.write.dir=file:///tmp/ should add '\' at the end.

[ayushtkn]

LGTM

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	11m 35s		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.
+0 🆗	markdownlint	0m 0s		markdownlint was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
			_ trunk Compile Tests _
+1 💚	mvninstall	43m 37s		trunk passed
+1 💚	mvnsite	1m 19s		trunk passed
+1 💚	shadedclient	77m 8s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 6s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	1m 7s		the patch passed
+1 💚	shadedclient	32m 39s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	asflicense	0m 48s		The patch does not generate ASF License warnings.
		124m 54s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7206/1/artifact/out/Dockerfile
GITHUB PR	#7206
Optional Tests	dupname asflicense mvnsite codespell detsecrets markdownlint
uname	Linux 584d387c53f1 5.15.0-122-generic #132-Ubuntu SMP Thu Aug 29 13:45:52 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	trunk / 99da36e
Max. process+thread count	551 (vs. ulimit of 5500)
modules	C: hadoop-hdfs-project/hadoop-hdfs U: hadoop-hdfs-project/hadoop-hdfs
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-7206/1/console
versions	git=2.25.1 maven=3.6.3
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