Updated java dump generation time in Hung RequestTiming FAT

[pgunapal]

• I have considered the risk of behavior change or other zero migration impact (https://github.com/OpenLiberty/open-liberty/wiki/Behavior-Changes).
• If this PR fixes an Issue, the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN" (verify release bug label if applicable: https://github.com/OpenLiberty/open-liberty/wiki/Open-Liberty-Conventions).
• If this PR resolves an external Known Issue (including APARS), the description includes "Fixes #FILLMEIN" or "Resolves #FILLMEIN".

fixes #30551

• Increased the time duration between java dumps, which maybe slow due to env slowness.

[pgunapal]

#build

[LibbyBot]

Code analysis and actions

DO NOT DELETE THIS COMMENT.

• 1 FAT files were changed, added, or removed.

• Check that the build did not break the affected FAT suite(s).

• Please describe in a separate comment how you tested your changes.

[LibbyBot]

Your personal build request is at https://wasrtc.hursley.ibm.com:9443/jazz/resource/itemOid/com.ibm.team.build.BuildResult/_9q53EOkCEe-iabY-3Iflhw

The build will run your changed FAT bucket(s) 10 times.

Target locations of links might be accessible only to IBM employees.

[pgunapal]

#build (view Open Liberty Personal Build - ✅ completed successfully!)

Note: Target locations of links might be accessible only to IBM employees.

[LibbyBot]

Code analysis and actions

DO NOT DELETE THIS COMMENT.

• 1 FAT files were changed, added, or removed.

• Check that the build did not break the affected FAT suite(s).

• Please describe in a separate comment how you tested your changes.

[LibbyBot]

Your personal build request is at https://wasrtc.hursley.ibm.com:9443/jazz/resource/itemOid/com.ibm.team.build.BuildResult/_mtPDUOp0Ee-iabY-3Iflhw

The build will run your changed FAT bucket(s) 10 times.

Target locations of links might be accessible only to IBM employees.

[fmhwong]

LGTM