HADOOP-17715 ABFS: Append blob tests with non HNS accounts fail (#3028)

[snehavarma]

(cherry picked from commit 4c039fa)

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	7m 59s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	shelldocs	0m 0s		Shelldocs was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	test4tests	0m 0s		The patch appears to include 1 new or modified test files.
			_ branch-3.3 Compile Tests _
+1 💚	mvninstall	33m 49s		branch-3.3 passed
+1 💚	mvnsite	0m 39s		branch-3.3 passed
+1 💚	shadedclient	16m 41s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	0m 33s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	0m 31s		the patch passed
+1 💚	shellcheck	0m 0s		No new issues.
+1 💚	shadedclient	15m 44s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	0m 32s		hadoop-azure in the patch passed.
+1 💚	asflicense	0m 35s		The patch does not generate ASF License warnings.
		79m 14s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3125/1/artifact/out/Dockerfile
GITHUB PR	#3125
Optional Tests	dupname asflicense mvnsite unit codespell shellcheck shelldocs
uname	Linux 68fa8e5ec581 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / 580f742
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3125/1/testReport/
Max. process+thread count	539 (vs. ulimit of 5500)
modules	C: hadoop-tools/hadoop-azure U: hadoop-tools/hadoop-azure
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-3125/1/console
versions	git=2.17.1 maven=3.6.0 shellcheck=0.4.6
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[snehavarma]

Testing done: It was ensured that the xml gets generated with the append blob config and runs successfully.

[surendralilhore]

+1