Fix syntax error in conftest.py

[cclauss]

Old style exceptions are syntax errors on Python 3 while new style exceptions work as expected on both Python 2 and Python 3.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	50	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
+1	@author	0	The patch does not contain any @author tags.
+1	test4tests	0	The patch appears to include 1 new or modified test files.
		_ trunk Compile Tests _
+1	mvninstall	627	trunk passed
-1	pylint	1	Error running pylint. Please check pylint stderr files.
+1	shadedclient	766	branch has no errors when building and testing our client artifacts.
		_ Patch Compile Tests _
+1	mvninstall	555	the patch passed
-1	pylint	1	Error running pylint. Please check pylint stderr files.
+1	pylint	2	There were no new pylint issues.
+1	whitespace	1	The patch has no whitespace issues.
+1	shadedclient	624	patch has no errors when building and testing our client artifacts.
		_ Other Tests _
+1	unit	86	hadoop-hdds in the patch passed.
+1	unit	266	hadoop-ozone in the patch passed.
+1	asflicense	31	The patch does not generate ASF License warnings.
		3161

Subsystem	Report/Notes
Docker	Client=19.03.1 Server=19.03.1 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/1/artifact/out/Dockerfile
GITHUB PR	#1285
Optional Tests	dupname asflicense unit pylint
uname	Linux d81dc661675a 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 / 9b8359b
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/1/artifact/out/branch-pylint-stderr.txt
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/1/artifact/out/patch-pylint-stderr.txt
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/1/testReport/
Max. process+thread count	447 (vs. ulimit of 5500)
modules	C: hadoop-ozone/fault-injection-test/network-tests U: hadoop-ozone/fault-injection-test/network-tests
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/1/console
versions	git=2.7.4 maven=3.3.9 pylint=1.9.2
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[cclauss]

flake8 finds syntax errors while avoiding the false positives that pylint is so famous for:
https://lukeplant.me.uk/blog/posts/pylint-false-positives

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	40	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
+1	@author	0	The patch does not contain any @author tags.
+1	test4tests	0	The patch appears to include 1 new or modified test files.
		_ trunk Compile Tests _
+1	mvninstall	574	trunk passed
-1	pylint	1	Error running pylint. Please check pylint stderr files.
+1	shadedclient	748	branch has no errors when building and testing our client artifacts.
		_ Patch Compile Tests _
+1	mvninstall	582	the patch passed
-1	pylint	1	Error running pylint. Please check pylint stderr files.
+1	pylint	2	There were no new pylint issues.
+1	whitespace	0	The patch has no whitespace issues.
+1	shadedclient	663	patch has no errors when building and testing our client artifacts.
		_ Other Tests _
+1	unit	92	hadoop-hdds in the patch passed.
+1	unit	291	hadoop-ozone in the patch passed.
+1	asflicense	49	The patch does not generate ASF License warnings.
		3197

Subsystem	Report/Notes
Docker	Client=19.03.1 Server=19.03.1 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/2/artifact/out/Dockerfile
GITHUB PR	#1285
Optional Tests	dupname asflicense unit pylint
uname	Linux 12d6d453fca0 4.4.0-138-generic #164-Ubuntu SMP Tue Oct 2 17:16:02 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / 6244502
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/2/artifact/out/branch-pylint-stderr.txt
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/2/artifact/out/patch-pylint-stderr.txt
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/2/testReport/
Max. process+thread count	412 (vs. ulimit of 5500)
modules	C: hadoop-ozone/fault-injection-test/network-tests U: hadoop-ozone/fault-injection-test/network-tests
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/2/console
versions	git=2.7.4 maven=3.3.9 pylint=1.9.2
Powered by	Apache Yetus 0.10.0 http://yetus.apache.org

This message was automatically generated.

[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	49	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
+1	@author	0	The patch does not contain any @author tags.
+1	test4tests	0	The patch appears to include 1 new or modified test files.
		_ trunk Compile Tests _
+1	mvninstall	642	trunk passed
-1	pylint	1	Error running pylint. Please check pylint stderr files.
+1	shadedclient	786	branch has no errors when building and testing our client artifacts.
-0	patch	840	Used diff version of patch file. Binary files and potentially other changes not applied. Please rebase and squash commits if necessary.
		_ Patch Compile Tests _
+1	mvninstall	593	the patch passed
-1	pylint	1	Error running pylint. Please check pylint stderr files.
+1	pylint	1	There were no new pylint issues.
+1	whitespace	1	The patch has no whitespace issues.
+1	shadedclient	657	patch has no errors when building and testing our client artifacts.
		_ Other Tests _
+1	unit	94	hadoop-hdds in the patch passed.
+1	unit	287	hadoop-ozone in the patch passed.
+1	asflicense	36	The patch does not generate ASF License warnings.
		3295

Subsystem	Report/Notes
Docker	Client=19.03.1 Server=19.03.1 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/3/artifact/out/Dockerfile
Optional Tests	dupname asflicense unit pylint
uname	Linux 76355a9f9a16 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 / ee7c261
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/3/artifact/out/branch-pylint-stderr.txt
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/3/artifact/out/patch-pylint-stderr.txt
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/3/testReport/
Max. process+thread count	447 (vs. ulimit of 5500)
modules	C: hadoop-ozone/fault-injection-test/network-tests U: hadoop-ozone/fault-injection-test/network-tests
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/3/console
versions	git=2.7.4 maven=3.3.9 pylint=1.9.2
Powered by	Apache Yetus 0.10.0 http://yetus.apache.org

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[hadoop-yetus]

💔 -1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	119	Docker mode activated.
		_ Prechecks _
+1	dupname	0	No case conflicting files found.
+1	@author	0	The patch does not contain any @author tags.
+1	test4tests	0	The patch appears to include 1 new or modified test files.
		_ trunk Compile Tests _
+1	mvninstall	707	trunk passed
-1	pylint	6	Error running pylint. Please check pylint stderr files.
+1	shadedclient	984	branch has no errors when building and testing our client artifacts.
		_ Patch Compile Tests _
+1	mvninstall	659	the patch passed
-1	pylint	7	Error running pylint. Please check pylint stderr files.
+1	pylint	7	There were no new pylint issues.
+1	whitespace	0	The patch has no whitespace issues.
+1	shadedclient	812	patch has no errors when building and testing our client artifacts.
		_ Other Tests _
+1	unit	107	hadoop-hdds in the patch passed.
+1	unit	301	hadoop-ozone in the patch passed.
+1	asflicense	36	The patch does not generate ASF License warnings.
		3934

Subsystem	Report/Notes
Docker	Client=18.09.7 Server=18.09.7 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/4/artifact/out/Dockerfile
GITHUB PR	#1285
Optional Tests	dupname asflicense unit pylint
uname	Linux 7643fa5e5345 4.15.0-52-generic #56-Ubuntu SMP Tue Jun 4 22:49:08 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / 3329257
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/4/artifact/out/branch-pylint-stderr.txt
pylint	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/4/artifact/out/patch-pylint-stderr.txt
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/4/testReport/
Max. process+thread count	306 (vs. ulimit of 5500)
modules	C: hadoop-ozone/fault-injection-test/network-tests U: hadoop-ozone/fault-injection-test/network-tests
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1285/4/console
versions	git=2.7.4 maven=3.3.9 pylint=1.9.2
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[cclauss]

IT IS EASIER TO HAVE AN AUTOMATON IGNORE THE SYNTAX ERRORS THAN TO FIX THEM.