fix: modify show_models() to display same ranks as leaderboard

[aron-bram]

Fixes #1594

I noticed that the show_models() function doesn't rank according to the cost, even though its documentation says so.

The issue was that there was a loop going over an array of models that was not sorted by the costs and the code assumed it to be sorted. Another array of models was sorted however, but not used to determine the rank. So I extended this sorted array with a rank column and used it to determine the rank later.

I only touched the show_models() function in automl.py

[codecov]

Codecov Report

Merging #1621 (64bf96b) into development (1abd1f9) will decrease coverage by 0.19%.
The diff coverage is 100.00%.

Additional details and impacted files

@@               Coverage Diff               @@
##           development    #1621      +/-   ##
===============================================
- Coverage        83.42%   83.22%   -0.20%     
===============================================
  Files              156      156              
  Lines            11927    11926       -1     
  Branches          1896     1896              
===============================================
- Hits              9950     9926      -24     
- Misses            1412     1433      +21     
- Partials           565      567       +2     

[eddiebergman]

Mmmm, I'm surprised I let this through, I was the one reviewing it. Nice find!