HBASE-24410 Generate CHANGES.md and RELEASENOTES.md for 2.2.5

[infraio]

No description provided.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	2m 8s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+0 🆗	markdownlint	0m 0s	markdownlint was not available.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
		_ branch-2.2 Compile Tests _
		_ Patch Compile Tests _
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
		_ Other Tests _
+1 💚	asflicense	0m 18s	The patch does not generate ASF License warnings.
		3m 45s

Subsystem	Report/Notes
Docker	Client=19.03.9 Server=19.03.9 base: https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-1752/1/artifact/out/Dockerfile
GITHUB PR	#1752
Optional Tests	dupname asflicense markdownlint
uname	Linux d881908ad18a 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 GNU/Linux
Build tool	maven
Personality	/home/jenkins/jenkins-slave/workspace/Base-PreCommit-GitHub-PR_PR-1752/out/precommit/personality/provided.sh
git revision	branch-2.2 / 5be6ebb
Max. process+thread count	47 (vs. ulimit of 10000)
modules	C: . U: .
Console output	https://builds.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-1752/1/console
versions	git=2.11.0 maven=2018-06-17T18:33:14Z)
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