HADOOP-18333: upgrade to jetty 9.4.48 (3.3 branch)

[pjfanning]

Description of PR

https://issues.apache.org/jira/browse/HADOOP-18333

Relates to #4553

How was this patch tested?

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 4s		Docker mode activated.
			_ Prechecks _
+1 💚	dupname	0m 0s		No case conflicting files found.
+0 🆗	codespell	0m 0s		codespell was not available.
+0 🆗	detsecrets	0m 0s		detect-secrets was not available.
+0 🆗	xmllint	0m 0s		xmllint was not available.
+0 🆗	shelldocs	0m 1s		Shelldocs was not available.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
-1 ❌	test4tests	0m 0s		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.
			_ branch-3.3 Compile Tests _
+0 🆗	mvndep	13m 55s		Maven dependency ordering for branch
+1 💚	mvninstall	23m 38s		branch-3.3 passed
+1 💚	compile	17m 59s		branch-3.3 passed
+1 💚	mvnsite	20m 14s		branch-3.3 passed
+1 💚	javadoc	7m 8s		branch-3.3 passed
+1 💚	shadedclient	30m 12s		branch has no errors when building and testing our client artifacts.
			_ Patch Compile Tests _
+0 🆗	mvndep	0m 59s		Maven dependency ordering for patch
+1 💚	mvninstall	21m 56s		the patch passed
+1 💚	compile	17m 30s		the patch passed
-1 ❌	javac	17m 30s	/results-compile-javac-root.txt	root generated 3 new + 1861 unchanged - 0 fixed = 1864 total (was 1861)
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	mvnsite	19m 58s		the patch passed
+1 💚	shellcheck	0m 0s		No new issues.
+1 💚	javadoc	7m 1s		the patch passed
+1 💚	shadedclient	33m 28s		patch has no errors when building and testing our client artifacts.
			_ Other Tests _
-1 ❌	unit	706m 4s	/patch-unit-root.txt	root in the patch passed.
+1 💚	asflicense	2m 30s		The patch does not generate ASF License warnings.
		918m 22s

Reason	Tests
Failed junit tests	hadoop.yarn.client.api.impl.TestAMRMClient
	hadoop.yarn.server.resourcemanager.scheduler.capacity.TestCapacitySchedulerAutoQueueCreation
	hadoop.yarn.sls.TestReservationSystemInvariants
	hadoop.hdfs.server.federation.router.TestRouterRpcMultiDestination
	hadoop.hdfs.server.federation.router.TestRouterRpc
	hadoop.hdfs.server.blockmanagement.TestUnderReplicatedBlocks
	hadoop.hdfs.server.datanode.TestDataNodeRollingUpgrade

Subsystem	Report/Notes
Docker	ClientAPI=1.41 ServerAPI=1.41 base: https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4583/1/artifact/out/Dockerfile
GITHUB PR	#4583
Optional Tests	dupname asflicense compile javac javadoc mvninstall mvnsite unit shadedclient codespell detsecrets xmllint shellcheck shelldocs
uname	Linux 64c756f0af1b 4.15.0-58-generic #64-Ubuntu SMP Tue Aug 6 11:12:41 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/bin/hadoop.sh
git revision	branch-3.3 / cb2023a
Default Java	Private Build-1.8.0_312-8u312-b07-0ubuntu1~18.04-b07
Test Results	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4583/1/testReport/
Max. process+thread count	3747 (vs. ulimit of 5500)
modules	C: hadoop-project . U: .
Console output	https://ci-hadoop.apache.org/job/hadoop-multibranch/job/PR-4583/1/console
versions	git=2.17.1 maven=3.6.0 shellcheck=0.4.6
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