Add logger flag to save_hyperparameters

[kaushikb11]

What does this PR do?

Fixes #6338

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[codecov]

Codecov Report

Merging #7960 (3b0a84a) into master (09ff295) will decrease coverage by 5%.
The diff coverage is 95%.

@@           Coverage Diff           @@
##           master   #7960    +/-   ##
=======================================
- Coverage      93%     88%    -5%     
=======================================
  Files         216     216            
  Lines       14009   14109   +100     
=======================================
- Hits        12985   12416   -569     
- Misses       1024    1693   +669     

[justusschock]

Did you try this with tensorboard? I think we disabled this on purpose, since actually we had issues that if we log them in the beginning, TB (the most common logger and default) does not properly update the metrics.

[SeanNaren]

nice feature!

[tchaton]

Love it !