HDDS-1219. TestContainerActionsHandler.testCloseContainerAction has an intermittent failure

[elek]

It's failed multiple times during the CI builds:

{code}
Error Message

Wanted but not invoked:
closeContainerEventHandler.onMessage(
#1,
org.apache.hadoop.hdds.server.events.EventQueue@3d3fcdb0
);
-> at org.apache.hadoop.hdds.scm.container.TestContainerActionsHandler.testCloseContainerAction(TestContainerActionsHandler.java:64)
Actually, there were zero interactions with this mock.
{code}

The fix is easy: we should call queue.processAll(1000L) to wait for the processing of all the events.

See: https://issues.apache.org/jira/browse/HDDS-1219

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	69	Docker mode activated.
		_ Prechecks _
+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	1356	trunk passed
+1	compile	61	trunk passed
+1	checkstyle	26	trunk passed
+1	mvnsite	38	trunk passed
+1	shadedclient	842	branch has no errors when building and testing our client artifacts.
+1	findbugs	58	trunk passed
+1	javadoc	28	trunk passed
		_ Patch Compile Tests _
+1	mvninstall	61	the patch passed
+1	compile	29	the patch passed
+1	javac	29	the patch passed
+1	checkstyle	17	the patch passed
+1	mvnsite	34	the patch passed
+1	whitespace	0	The patch has no whitespace issues.
+1	shadedclient	872	patch has no errors when building and testing our client artifacts.
+1	findbugs	53	the patch passed
+1	javadoc	23	the patch passed
		_ Other Tests _
+1	unit	138	server-scm in the patch passed.
+1	asflicense	32	The patch does not generate ASF License warnings.
		3858

Subsystem	Report/Notes
Docker	Client=17.05.0-ce Server=17.05.0-ce base: https://builds.apache.org/job/hadoop-multibranch/job/PR-555/1/artifact/out/Dockerfile
GITHUB PR	#555
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient findbugs checkstyle
uname	Linux 45fdd96c8548 3.13.0-153-generic #203-Ubuntu SMP Thu Jun 14 08:52:28 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	personality/hadoop.sh
git revision	trunk / 0aefe28
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-555/1/testReport/
Max. process+thread count	457 (vs. ulimit of 5500)
modules	C: hadoop-hdds/server-scm U: hadoop-hdds/server-scm
Console output	https://builds.apache.org/job/hadoop-multibranch/job/PR-555/1/console
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[arp7]

LGTM.

[arp7]

+1