HADOOP-16653. S3Guard DDB overreacts to no tag access.

[steveloughran]

Initial PR just creates the test to demonstrate the issue.

Change-Id: I8ab98acbdf3d854491571ee98627f96a98cbde48

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	81	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	1270	trunk passed
+1	compile	36	trunk passed
+1	checkstyle	27	trunk passed
+1	mvnsite	40	trunk passed
+1	shadedclient	862	branch has no errors when building and testing our client artifacts.
+1	javadoc	25	trunk passed
0	spotbugs	90	Used deprecated FindBugs config; considering switching to SpotBugs.
+1	findbugs	87	trunk passed
		_ Patch Compile Tests _
+1	mvninstall	42	the patch passed
+1	compile	28	the patch passed
+1	javac	28	the patch passed
+1	checkstyle	21	the patch passed
+1	mvnsite	39	the patch passed
+1	whitespace	0	The patch has no whitespace issues.
+1	shadedclient	896	patch has no errors when building and testing our client artifacts.
+1	javadoc	26	the patch passed
+1	findbugs	72	the patch passed
		_ Other Tests _
+1	unit	92	hadoop-aws in the patch passed.
+1	asflicense	30	The patch does not generate ASF License warnings.
		3769

Subsystem	Report/Notes
Docker	Client=19.03.3 Server=19.03.3 base: https://builds.apache.org/job/hadoop-multibranch/job/PR-1653/1/artifact/out/Dockerfile
GITHUB PR	#1653
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle
uname	Linux fc2f28ee986e 4.15.0-54-generic #58-Ubuntu SMP Mon Jun 24 10:55:24 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / 5f4641a
Default Java	1.8.0_222
Test Results	https://builds.apache.org/job/hadoop-multibranch/job/PR-1653/1/testReport/
Max. process+thread count	336 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-aws U: hadoop-tools/hadoop-aws
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-1653/1/console
versions	git=2.7.4 maven=3.3.9 findbugs=3.1.0-RC1
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