import Int into test_datachain_merge (fix tests broken on bad merge)

[mattseddon]

I merged #832 into main without first updating the branch.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.42%. Comparing base (2c9c71f) to head (97a9ad2).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #837   +/-   ##
=======================================
  Coverage   87.42%   87.42%           
=======================================
  Files         128      128           
  Lines       11424    11424           
  Branches     1557     1557           
=======================================
  Hits         9987     9987           
  Misses       1042     1042           
  Partials      395      395           

Flag	Coverage Δ
datachain	87.35% <ø> (ø)

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