HBASE-22611 Close the DataOutputStream object

[yuliangwan]

DataOutputStream is not closed after used.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
0	reexec	98	Docker mode activated.
		_ Prechecks _
+1	hbaseanti	0	Patch does not have any anti-patterns.
+1	@author	0	The patch does not contain any @author tags.
-0	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.
		_ master Compile Tests _
+1	mvninstall	391	master passed
+1	compile	38	master passed
+1	checkstyle	42	master passed
+1	shadedjars	409	branch has no errors when building our shaded downstream artifacts.
+1	findbugs	73	master passed
+1	javadoc	34	master passed
		_ Patch Compile Tests _
+1	mvninstall	384	the patch passed
+1	compile	40	the patch passed
+1	javac	40	the patch passed
+1	checkstyle	47	the patch passed
+1	whitespace	0	The patch has no whitespace issues.
+1	shadedjars	409	patch has no errors when building our shaded downstream artifacts.
+1	hadoopcheck	1154	Patch does not cause any errors with Hadoop 2.8.5 2.9.2 or 3.1.2.
+1	findbugs	68	the patch passed
+1	javadoc	29	the patch passed
		_ Other Tests _
+1	unit	225	hbase-common in the patch passed.
+1	asflicense	13	The patch does not generate ASF License warnings.
		3914

Subsystem	Report/Notes
Docker	Client=17.05.0-ce Server=17.05.0-ce base: https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-325/1/artifact/out/Dockerfile
GITHUB PR	#325
Optional Tests	dupname asflicense javac javadoc unit findbugs shadedjars hadoopcheck hbaseanti checkstyle compile
uname	Linux 861758f6c0cb 4.4.0-131-generic #157~14.04.1-Ubuntu SMP Fri Jul 13 08:53:17 UTC 2018 x86_64 GNU/Linux
Build tool	maven
Personality	/testptch/patchprocess/precommit/personality/provided.sh
git revision	master / c7c6140
maven	version: Apache Maven 3.5.4 (1edded0938998edf8bf061f1ceb3cfdeccf443fe; 2018-06-17T18:33:14Z)
Default Java	1.8.0_181
findbugs	v3.1.11
Test Results	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-325/1/testReport/
Max. process+thread count	254 (vs. ulimit of 10000)
modules	C: hbase-common U: hbase-common
Console output	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-325/1/console
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