HDDS-1405. ITestOzoneContractCreate is failing.

[lokeshj1703]

ITestOzoneContractCreate and ITestOzoneContractMkdir are failing with FileAlreadyExistsException. The issue is around the file imported in BasicOzoneClientAdapterImpl. The class needs to import org.apache.hadoop.fs.FileAlreadyExistsException but currently imports java.nio.file.FileAlreadyExistsException.

[elek]

/retest

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	32	Docker mode activated.
		_ Prechecks _
+1	@author	0	The patch does not contain any @author tags.
-1	test4tests	0	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	1090	trunk passed
+1	compile	27	trunk passed
+1	checkstyle	14	trunk passed
+1	mvnsite	29	trunk passed
+1	shadedclient	680	branch has no errors when building and testing our client artifacts.
+1	findbugs	33	trunk passed
+1	javadoc	20	trunk passed
		_ Patch Compile Tests _
+1	mvninstall	24	the patch passed
+1	compile	22	the patch passed
+1	javac	22	the patch passed
+1	checkstyle	10	the patch passed
+1	mvnsite	23	the patch passed
+1	whitespace	0	The patch has no whitespace issues.
+1	shadedclient	731	patch has no errors when building and testing our client artifacts.
+1	findbugs	41	the patch passed
+1	javadoc	18	the patch passed
		_ Other Tests _
+1	unit	102	ozonefs in the patch passed.
+1	asflicense	28	The patch does not generate ASF License warnings.
		3018

Subsystem	Report/Notes
Docker	Client=17.05.0-ce Server=17.05.0-ce base: https://builds.apache.org/job/hadoop-multibranch/job/PR-712/1/artifact/out/Dockerfile
GITHUB PR	#712
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle
uname	Linux f8c24cf14bd3 4.4.0-139-generic #165-Ubuntu SMP Wed Oct 24 10:58:50 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / 73f43ac
maven	version: Apache Maven 3.3.9
Default Java	1.8.0_191
findbugs	v3.1.0-RC1
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-712/1/testReport/
Max. process+thread count	3131 (vs. ulimit of 5500)
modules	C: hadoop-ozone/ozonefs U: hadoop-ozone/ozonefs
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-712/1/console
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[lokeshj1703]

The test failure is not related. Since it is just an import change no new tests were added.

[lokeshj1703]

@mukul1987 @elek Thanks for reviewing the changes. I have committed the changes to trunk.