HADOOP-16811: Use JUnit TemporaryFolder Rule in TestFileUtils

[belugabehr]

NOTICE

Please create an issue in ASF JIRA before opening a pull request,
and you need to set the title of the pull request which starts with
the corresponding JIRA issue number. (e.g. HADOOP-XXXXX. Fix a typo in YYY.)
For more details, please see https://cwiki.apache.org/confluence/display/HADOOP/How+To+Contribute

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 10s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s	The patch appears to include 1 new or modified test files.
		_ trunk Compile Tests _
+1 💚	mvninstall	21m 2s	trunk passed
+1 💚	compile	17m 31s	trunk passed
+1 💚	checkstyle	0m 45s	trunk passed
+1 💚	mvnsite	1m 20s	trunk passed
+1 💚	shadedclient	16m 10s	branch has no errors when building and testing our client artifacts.
+1 💚	javadoc	1m 26s	trunk passed
+0 🆗	spotbugs	2m 8s	Used deprecated FindBugs config; considering switching to SpotBugs.
+1 💚	findbugs	2m 5s	trunk passed
		_ Patch Compile Tests _
+1 💚	mvninstall	0m 49s	the patch passed
+1 💚	compile	16m 39s	the patch passed
+1 💚	javac	16m 39s	the patch passed
+1 💚	checkstyle	0m 44s	hadoop-common-project/hadoop-common: The patch generated 0 new + 57 unchanged - 1 fixed = 57 total (was 58)
+1 💚	mvnsite	1m 22s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	shadedclient	13m 40s	patch has no errors when building and testing our client artifacts.
+1 💚	javadoc	1m 23s	the patch passed
+1 💚	findbugs	2m 12s	the patch passed
		_ Other Tests _
+1 💚	unit	9m 14s	hadoop-common in the patch passed.
+1 💚	asflicense	0m 45s	The patch does not generate ASF License warnings.
		109m 24s

Subsystem	Report/Notes
Docker	Client=19.03.5 Server=19.03.5 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1811/2/artifact/out/Dockerfile
GITHUB PR	#1811
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle
uname	Linux af8b35854133 4.15.0-74-generic #84-Ubuntu SMP Thu Dec 19 08:06:28 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / 6a859d3
Default Java	1.8.0_232
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1811/2/testReport/
Max. process+thread count	1343 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1811/2/console
versions	git=2.7.4 maven=3.3.9 findbugs=3.1.0-RC1
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[steveloughran]

LGTM.
you happy with this yourself?

[belugabehr]

Yup! Thanks!

…

On Tue, Jan 21, 2020, 9:34 AM Steve Loughran ***@***.***> wrote: LGTM. you happy with this yourself? — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#1811?email_source=notifications&email_token=AC766E6C3HGPOBIE6ZS6KJ3Q64BXNA5CNFSM4KIKBYH2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOEJP6CGQ#issuecomment-576708890>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AC766E2W3OIZNO4PQT6WKMTQ64BXNANCNFSM4KIKBYHQ> .

[ayushtkn]

LGTM