Fix pre-commit isort failure on tests/trainer/*.py

[arnaudgelas]

What does this PR do?

Relates to #4805

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[codecov]

Codecov Report

Merging #5421 (59cb7c0) into release/1.2-dev (d8a0c7d) will not change coverage.
The diff coverage is n/a.

@@               Coverage Diff               @@
##           release/1.2-dev   #5421   +/-   ##
===============================================
  Coverage               93%     93%           
===============================================
  Files                  152     152           
  Lines                10732   10732           
===============================================
  Hits                  9944    9944           
  Misses                 788     788           

[arnaudgelas]

Please merge first #5420

[Borda]

@arnaudgelas it seems you introduced cumulative change from other PR, mind keep the change only to files mentioned in the PR, so here it is tests/trainer/*.py

redo

[Borda]

Please merge first #5420

pls make the changes independent, there is no reason why it shall be cumulative and we would need to rebase each PR

[arnaudgelas]

@Borda Once #5420 gets merged, I will rebase that one.

[arnaudgelas]

@Borda rebased

[arnaudgelas]

@Borda The 2 commits are atomic and meaningful as such. I don't get why you want to squash them? I though that was one of your requirement, squashing them together is going the other way around, isn't it?