HADOOP-18365. Update the remote address when a change is detected (#4692)

[snmvaughan]

Back port to branch-3.3, to avoid reconnecting to the old address after detecting that the address has been updated.

• Use a stable hashCode to allow safe IP addr changes
• Add test that updated address is used

Once the address has been updated, it will be used in future calls. Test verifies that a second request succeeds and that it uses the existing updated address instead of having to re-resolve.

For code changes:

• Does the title or this PR starts with the corresponding JIRA issue id (e.g. 'HADOOP-17799. Your PR title ...')?
• Object storage: have the integration tests been executed and the endpoint declared according to the connector-specific documentation?
• If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under ASF 2.0?
• If applicable, have you updated the LICENSE, LICENSE-binary, NOTICE-binary files?

[hadoop-yetus]

🎊 +1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	7m 5s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 1s		codespell was not available.
+0 🆗	detsecrets	0m 1s		detect-secrets 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	36m 23s		branch-3.3 passed
+1 💚	compile	18m 9s		branch-3.3 passed
+1 💚	checkstyle	1m 32s		branch-3.3 passed
+1 💚	mvnsite	2m 5s		branch-3.3 passed
+1 💚	javadoc	1m 26s		branch-3.3 passed
+1 💚	spotbugs	3m 5s		branch-3.3 passed
+1 💚	shadedclient	27m 38s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	1m 5s		the patch passed
+1 💚	compile	17m 24s		the patch passed
+1 💚	javac	17m 24s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	1m 28s		hadoop-common-project/hadoop-common: The patch generated 0 new + 129 unchanged - 3 fixed = 129 total (was 132)
+1 💚	mvnsite	2m 4s		the patch passed
+1 💚	javadoc	1m 19s		the patch passed
+1 💚	spotbugs	3m 4s		the patch passed
+1 💚	shadedclient	27m 34s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
+1 💚	unit	18m 16s		hadoop-common in the patch passed.
+1 💚	asflicense	1m 32s		The patch does not generate ASF License warnings.
		170m 41s

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4768/1/artifact/out/Dockerfile
GITHUB PR	#4768
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient spotbugs checkstyle codespell detsecrets
uname	Linux 3ae5eb2b7cd3 4.15.0-191-generic #202-Ubuntu SMP Thu Aug 4 01:49:29 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / 39bf713
Default Java	Private Build-1.8.0_342-8u342-b07-0ubuntu1~18.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4768/1/testReport/
Max. process+thread count	1267 (vs. ulimit of 5500)
modules	C: hadoop-common-project/hadoop-common U: hadoop-common-project/hadoop-common
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4768/1/console
versions	git=2.17.1 maven=3.6.0 spotbugs=4.2.2
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[sunchao]

Merged, thanks!