Upgrade echoserver to 2.5

[johngmyers]

Issue

Description

Upgrade echoserver to a version that supports IPv6.

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the docs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[codecov-commenter]

Codecov Report

Merging #2452 (181623b) into main (cc59a8c) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2452   +/-   ##
=======================================
  Coverage   53.42%   53.42%           
=======================================
  Files         140      140           
  Lines        7975     7975           
=======================================
  Hits         4261     4261           
  Misses       3397     3397           
  Partials      317      317           

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[kishorj]

/lgtm

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: johngmyers, kishorj

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