HBASE-27261 Generate CHANGES.txt for 1.7.2

[Apache9]

No description provided.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	4m 25s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ branch-1 Compile Tests _
		_ Patch Compile Tests _
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
		_ Other Tests _
+1 💚	asflicense	1m 52s	The patch does not generate ASF License warnings.
		9m 17s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4674/1/artifact/out/Dockerfile
GITHUB PR	#4674
Optional Tests	dupname asflicense
uname	Linux d4fdf79dc29c 5.4.0-1025-aws #25~18.04.1-Ubuntu SMP Fri Sep 11 12:03:04 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	/home/jenkins/jenkins-home/workspace/Base-PreCommit-GitHub-PR_PR-4674/out/precommit/personality/provided.sh
git revision	branch-1 / 41e9e52
Max. process+thread count	31 (vs. ulimit of 10000)
modules	C: . U: .
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-4674/1/console
versions	git=2.17.1 maven=3.6.0
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[ddupg]

+1