Fix coverage sources

[AlexVCaron]

Quick description

Codecov.io is not finding the changes associated to the uploaded coverage metrics. This PR will address this, but it is done through iterative fixing.

...

Type of change

Check the relevant options.

• Bug fix (non-breaking change which fixes an issue)

Provide data, screenshots, command line to test (if relevant)

codecov.io will tell everything

Checklist

• My code follows the style guidelines of this project (run autopep8)
• I added relevant citations to scripts, modules and functions docstrings and descriptions
• I have performed a self-review of my code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I moved all functions from the script file (except the argparser and main) to scilpy modules
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (9565115) 65.95% compared to head (6ae0976) 0.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #902       +/-   ##
==========================================
- Coverage   65.95%   0.00%   -65.96%     
==========================================
  Files         384     384               
  Lines       21352   21352               
  Branches     3495    3495               
==========================================
- Hits        14083       0    -14083     
- Misses       5661   21352    +15691     
+ Partials     1608       0     -1608     

Components	Coverage Δ
Scripts	0.00% <ø> (∅)
Library	0.00% <ø> (∅)

[AlexVCaron]

Merge when you want. PR will still have 0 coverage, but merge to master should be correct.