Add -Xtrace to debug NoClassDefFoundError

[tjwatson]

• 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".

[tjwatson]

#build (view Open Liberty Personal Build - ❌ completed with errors/failures.)

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[dazavala]

Looks good. And good luck with this one!

[LibbyBot]

Your personal build request is at https://wasrtc.hursley.ibm.com:9443/jazz/resource/itemOid/com.ibm.team.build.BuildResult/_mo9UoLkOEe-nk6z2vlGZZw

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[LibbyBot]

Code analysis and actions

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

• 1 test infrastructure code files were changed.

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[tjwatson]

#build (view Open Liberty Personal Build - ❌ completed with errors/failures.)

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

[LibbyBot]

Code analysis and actions

DO NOT DELETE THIS COMMENT.

• 1 test infrastructure code files were changed.

• Test failures/errors in the build could be due to these changes.

• 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/_cctqEMxJEe-f-sI4gb7_Pw

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