Fix integration test failure

[danielfromearth]

GitHub Issue: #204

Description

This fixes the integration test failures that were happening because concatenation was happening even though concatenate=true was not passed to the Harmony request.

@chris-durbin helped diagnose the issue, and it was determined that in Harmony, currently
concatenate_by_default: true
So that "...if the SAMBAH chain is selected, the concatenate is true unless explicitly false."

We're pretty sure this logic/behavior was hidden and we avoided seeing it before because we had the l2-subsetter service associated to the collections also. Thus, when a request didn't have concatenate, it was processed by the standalone l2-susbetter service, not SAMBAH. However, as of now, we don't have the l2-subsetter standalone service associated, so it's all on the SAMBAH configuration logic.

Overview of integration done

Passing the integration test again.

PR Acceptance Checklist

• [n/a] Unit tests added/updated and passing.
• Integration testing
• CHANGELOG.md updated
• Documentation updated (if needed).

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📚 Documentation preview 📚: https://stitchee--205.org.readthedocs.build/en/205/

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.84%. Comparing base (ab0118c) to head (a7461f3).

Additional details and impacted files

@@             Coverage Diff              @@
##           develop     #205       +/-   ##
============================================
+ Coverage    22.11%   49.84%   +27.72%     
============================================
  Files           11       11               
  Lines          642      642               
============================================
+ Hits           142      320      +178     
+ Misses         500      322      -178     

Flag	Coverage Δ
integration	43.92% <ø> (?)
unittests	22.11% <ø> (ø)

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