Add __repr__ for transforms.RandomErasing

[zeakey]

This PR adds repr for transforms.RandomErasing.

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[codecov]

Codecov Report

Merging #3491 (f09b0b8) into master (945f3a8) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #3491      +/-   ##
==========================================
+ Coverage   78.69%   78.71%   +0.01%     
==========================================
  Files         105      105              
  Lines        9704     9711       +7     
  Branches     1555     1555              
==========================================
+ Hits         7637     7644       +7     
  Misses       1576     1576              
  Partials      491      491              

Impacted Files	Coverage Δ
torchvision/transforms/transforms.py	84.28% <100.00%> (+0.15%)	⬆️

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[fmassa]

Thanks for the PR!

Can you add a test for this functionality, so that we can merge it?

[fmassa]

Thanks!