HBASE-28924 Create the start time right before creating the reader to calculate elapsedTime in testPrefetchWithDelay

[gvprathyusha6]

This test currently fails intermittently in master branch, as startime is post reader creation
Elapsed time is sometimes 25074ms and sometimes 24994ms (but delay is 25000ms) since starttime was calculated after reader creation

[Apache-HBase]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 17s		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.
+1 💚	@author	0m 0s		The patch does not contain any @author tags.
+1 💚	hbaseanti	0m 0s		Patch does not have any anti-patterns.
			_ master Compile Tests _
+1 💚	mvninstall	3m 7s		master passed
+1 💚	compile	2m 58s		master passed
+1 💚	checkstyle	0m 39s		master passed
-1 ❌	spotbugs	1m 37s	/branch-spotbugs-hbase-server-warnings.html	hbase-server in master has 1 extant spotbugs warnings.
+1 💚	spotless	0m 45s		branch has no errors when running spotless:check.
			_ Patch Compile Tests _
+1 💚	mvninstall	2m 54s		the patch passed
+1 💚	compile	3m 3s		the patch passed
+1 💚	javac	3m 3s		the patch passed
+1 💚	blanks	0m 0s		The patch has no blanks issues.
+1 💚	checkstyle	0m 37s		the patch passed
+1 💚	spotbugs	1m 43s		the patch passed
+1 💚	hadoopcheck	10m 32s		Patch does not cause any errors with Hadoop 3.3.6 3.4.0.
+1 💚	spotless	0m 44s		patch has no errors when running spotless:check.
			_ Other Tests _
+1 💚	asflicense	0m 12s		The patch does not generate ASF License warnings.
		35m 42s

Subsystem	Report/Notes
Docker	ClientAPI=1.47 ServerAPI=1.47 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6371/1/artifact/yetus-general-check/output/Dockerfile
GITHUB PR	#6371
Optional Tests	dupname asflicense javac spotbugs checkstyle codespell detsecrets compile hadoopcheck hbaseanti spotless
uname	Linux 4b3b3dc2df97 5.4.0-192-generic #212-Ubuntu SMP Fri Jul 5 09:47:39 UTC 2024 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 3994500
Default Java	Eclipse Adoptium-17.0.11+9
Max. process+thread count	84 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6371/1/console
versions	git=2.34.1 maven=3.9.8 spotbugs=4.7.3
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[apurtell]

@gvprathyusha6 Approved. The spotbugs warning is unrelated.

[Apache-HBase]

💔 -1 overall

Vote	Subsystem	Runtime	Logfile	Comment
+0 🆗	reexec	0m 27s		Docker mode activated.
-0 ⚠️	yetus	0m 2s		Unprocessed flag(s): --brief-report-file --spotbugs-strict-precheck --author-ignore-list --blanks-eol-ignore-file --blanks-tabs-ignore-file --quick-hadoopcheck
			_ Prechecks _
			_ master Compile Tests _
+1 💚	mvninstall	3m 14s		master passed
+1 💚	compile	0m 56s		master passed
+1 💚	javadoc	0m 28s		master passed
+1 💚	shadedjars	5m 45s		branch has no errors when building our shaded downstream artifacts.
			_ Patch Compile Tests _
+1 💚	mvninstall	3m 4s		the patch passed
+1 💚	compile	0m 57s		the patch passed
+1 💚	javac	0m 57s		the patch passed
+1 💚	javadoc	0m 27s		the patch passed
+1 💚	shadedjars	5m 41s		patch has no errors when building our shaded downstream artifacts.
			_ Other Tests _
-1 ❌	unit	213m 26s	/patch-unit-hbase-server.txt	hbase-server in the patch failed.
		239m 7s

Subsystem	Report/Notes
Docker	ClientAPI=1.43 ServerAPI=1.43 base: https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6371/1/artifact/yetus-jdk17-hadoop3-check/output/Dockerfile
GITHUB PR	#6371
Optional Tests	javac javadoc unit compile shadedjars
uname	Linux ce932b5d984f 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	dev-support/hbase-personality.sh
git revision	master / 3994500
Default Java	Eclipse Adoptium-17.0.11+9
Test Results	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6371/1/testReport/
Max. process+thread count	5285 (vs. ulimit of 30000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hbase.apache.org/job/HBase-PreCommit-GitHub-PR/job/PR-6371/1/console
versions	git=2.34.1 maven=3.9.8
Powered by	Apache Yetus 0.15.0 https://yetus.apache.org

This message was automatically generated.

[NihalJain]

The spotbugs warning is unrelated.

Raised HBASE-28927 for spotbugs, introduced in HBASE-28432. Sorry for the noise !

[NihalJain]

Hi @apurtell just a heads up. Seems JIRA# somehow got lost during merge of this PR