Modify the post_fp_cp2k function to generate multisystem data. Allows to run different system at one single iteration model_devi step.

[dulinhan]

Modify the post_fp_cp2k function to generate multisystem data. Allows to run different system at one single iteration model_devi step.

[Yi-FanLi]

Please delete the code you want to delete instead of commenting it and leaving it here. : )

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 49.50%. Comparing base (d28dbe6) to head (fd6950d).

Additional details and impacted files

@@            Coverage Diff             @@
##            devel    #1513      +/-   ##
==========================================
- Coverage   49.50%   49.50%   -0.01%     
==========================================
  Files          83       83              
  Lines       14818    14816       -2     
==========================================
- Hits         7336     7335       -1     
+ Misses       7482     7481       -1     

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[Yi-FanLi]

Now it looks good!