TDK-10240: Fix for TDK result validation in the Nginx delay test scripts

[mkumar705]

Reason for change: Added fix for handling expected behaviour for server delay scenarios Test Procedure:Verify with TDK TM
Risks: None
Priority : Medium

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[github-actions]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution. You can sign the CLA by just posting a Pull Request Comment same as the below format.

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