Improve debugging of integration testing

[HealthyPear]

Small refactoring that allows the visualization of the commands issued by the testing suite when launching pytest with the additional flag -s

[codecov]

Codecov Report

Merging #119 (ec58eea) into master (6d7a41f) will increase coverage by 0.31%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #119      +/-   ##
==========================================
+ Coverage   47.32%   47.64%   +0.31%     
==========================================
  Files          22       22              
  Lines        1980     1992      +12     
==========================================
+ Hits          937      949      +12     
  Misses       1043     1043              

Impacted Files	Coverage Δ
protopipe/scripts/tests/test_pipeline.py	100.00% <100.00%> (ø)

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